Reference: Wavelength to RGB Color Codes for Forum Signatures (Spectrum)

[raccoon]

This took me a bit of researching, so I thought I'd post a simple reference of wavelength to RGB color codes for use in signatures and posts.
There is no "correct" color conversion, and many people have their own adaptation... this is just one option that looks nice.

Shorthand hex color codes for laser wavelength to RGB. ie, [color=#0FF]488nm[/color] [color=#0FE]492nm[/color]

380nm 381nm 382nm 383nm 384nm 385nm 386nm 387nm 388nm 389nm 390nm 391nm 392nm 393nm 394nm 395nm 396nm 397nm 398nm 399nm
400nm 401nm 402nm 403nm 404nm 405nm 406nm 407nm 408nm 409nm 410nm 411nm 412nm 413nm 414nm 415nm 416nm 417nm 418nm 419nm
420nm 421nm 422nm 423nm 424nm 425nm 426nm 427nm 428nm 429nm 430nm 431nm 432nm 433nm 434nm 435nm 436nm 437nm 438nm 439nm
440nm 441nm 442nm 443nm 444nm 445nm 446nm 447nm 448nm 449nm 450nm 451nm 452nm 453nm 454nm 455nm 456nm 457nm 458nm 459nm
460nm 461nm 462nm 463nm 464nm 465nm 466nm 467nm 468nm 469nm 470nm 471nm 472nm 473nm 474nm 475nm 476nm 477nm 478nm 479nm
480nm 481nm 482nm 483nm 484nm 485nm 486nm 487nm 488nm 489nm 490nm 491nm 492nm 493nm 494nm 495nm 496nm 497nm 498nm 499nm
500nm 501nm 502nm 503nm 504nm 505nm 506nm 507nm 508nm 509nm 510nm 511nm 512nm 513nm 514nm 515nm 516nm 517nm 518nm 519nm
520nm 521nm 522nm 523nm 524nm 525nm 526nm 527nm 528nm 529nm 530nm 531nm 532nm 533nm 534nm 535nm 536nm 537nm 538nm 539nm
540nm 541nm 542nm 543nm 544nm 545nm 546nm 547nm 548nm 549nm 550nm 551nm 552nm 553nm 554nm 555nm 556nm 557nm 558nm 559nm
560nm 561nm 562nm 563nm 564nm 565nm 566nm 567nm 568nm 569nm 570nm 571nm 572nm 573nm 574nm 575nm 576nm 577nm 578nm 579nm
580nm 581nm 582nm 583nm 584nm 585nm 586nm 587nm 588nm 589nm 590nm 591nm 592nm 593nm 594nm 595nm 596nm 597nm 598nm 599nm
600nm 601nm 602nm 603nm 604nm 605nm 606nm 607nm 608nm 609nm 610nm 611nm 612nm 613nm 614nm 615nm 616nm 617nm 618nm 619nm
620nm 621nm 622nm 623nm 624nm 625nm 626nm 627nm 628nm 629nm 630nm 631nm 632nm 633nm 634nm 635nm 636nm 637nm 638nm 639nm
640nm 641nm 642nm 643nm 644nm 645nm 646nm 647nm 648nm 649nm 650nm 651nm 652nm 653nm 654nm 655nm 656nm 657nm 658nm 659nm
660nm 661nm 662nm 663nm 664nm 665nm 666nm 667nm 668nm 669nm 670nm 671nm 672nm 673nm 674nm 675nm 676nm 677nm 678nm 679nm
680nm 681nm 682nm 683nm 684nm 685nm 686nm 687nm 688nm 689nm 690nm 691nm 692nm 693nm 694nm 695nm 696nm 697nm 698nm 699nm
700nm 701nm 702nm 703nm 704nm 705nm 706nm 707nm 708nm 709nm 710nm 711nm 712nm 713nm 714nm 715nm 716nm 717nm 718nm 719nm
720nm 721nm 722nm 723nm 724nm 725nm 726nm 727nm 728nm 729nm 730nm 731nm 732nm 733nm 734nm 735nm 736nm 737nm 738nm 739nm
740nm 741nm 742nm 743nm 744nm 745nm 746nm 747nm 748nm 749nm 750nm 751nm 752nm 753nm 754nm 755nm 756nm 757nm 758nm 759nm
760nm 761nm 762nm 763nm 764nm 765nm 766nm 767nm 768nm 769nm 770nm 771nm 772nm 773nm 774nm 775nm 776nm 777nm 778nm 779nm

Search for your color codes below. Hit Ctrl+F in your browser.

[color=#606]380nm 381nm 382nm[/color] [color=#607]383nm 384nm[/color] [color=#707]385nm 386nm[/color] [color=#708]387nm 388nm 389nm 390nm[/color] [color=#709]391nm 392nm 393nm 394nm[/color] [color=#809]395nm[/color] [color=#80a]396nm 397nm 398nm 399nm[/color]
[color=#80b]400nm 401nm 402nm 403nm[/color] [color=#80c]404nm 405nm 406nm 407nm 408nm[/color] [color=#70d]409nm 410nm 411nm 412nm[/color] [color=#70e]413nm 414nm 415nm 416nm 417nm[/color] [color=#70f]418nm[/color] [color=#60f]419nm
420nm 421nm 422nm[/color] [color=#50f]423nm 424nm 425nm 426nm[/color] [color=#40f]427nm 428nm 429nm 430nm[/color] [color=#30f]431nm 432nm 433nm[/color] [color=#20f]434nm 435nm 436nm[/color] [color=#10f]437nm 438nm 439nm[/color]
[color=#00f]440nm[/color] [color=#01f]441nm 442nm[/color] [color=#02f]443nm 444nm 445nm[/color] [color=#03f]446nm 447nm 448nm[/color] [color=#04f]449nm 450nm 451nm[/color] [color=#05f]452nm 453nm 454nm[/color] [color=#06f]455nm 456nm 457nm[/color] [color=#07f]458nm 459nm
460nm 461nm[/color] [color=#08f]462nm 463nm 464nm[/color] [color=#09f]465nm 466nm 467nm 468nm[/color] [color=#0af]469nm 470nm 471nm 472nm[/color] [color=#0bf]473nm 474nm 475nm[/color] [color=#0cf]476nm 477nm 478nm 479nm[/color]
[color=#0df]480nm 481nm 482nm 483nm[/color] [color=#0ef]484nm 485nm 486nm 487nm[/color] [color=#0ff]488nm 489nm 490nm[/color] [color=#0fe]491nm 492nm[/color] [color=#0fd]493nm 494nm[/color] [color=#0fc]495nm[/color] [color=#0fb]496nm 497nm[/color] [color=#0fa]498nm[/color] [color=#0f9]499nm
500nm[/color] [color=#0f8]501nm[/color] [color=#0f7]502nm[/color] [color=#0f6]503nm 504nm[/color] [color=#0f5]505nm[/color] [color=#0f4]506nm[/color] [color=#0f3]507nm[/color] [color=#0f2]508nm[/color] [color=#0f1]509nm[/color] [color=#0f0]510nm[/color] [color=#1f0]511nm 512nm 513nm[/color] [color=#2f0]514nm 515nm 516nm 517nm[/color] [color=#3f0]518nm 519nm
520nm 521nm[/color] [color=#4f0]522nm 523nm 524nm 525nm[/color] [color=#5f0]526nm 527nm 528nm 529nm[/color] [color=#6f0]530nm 531nm 532nm 533nm 534nm[/color] [color=#7f0]535nm 536nm 537nm 538nm 539nm[/color]
[color=#8f0]540nm 541nm 542nm 543nm 544nm[/color] [color=#9f0]545nm 546nm 547nm 548nm 549nm[/color] [color=#af0]550nm 551nm 552nm 553nm 554nm[/color] [color=#bf0]555nm 556nm 557nm 558nm 559nm
560nm[/color] [color=#cf0]561nm 562nm 563nm 564nm 565nm[/color] [color=#df0]566nm 567nm 568nm 569nm 570nm 571nm[/color] [color=#ef0]572nm 573nm 574nm 575nm 576nm 577nm[/color] [color=#ff0]578nm 579nm
580nm 581nm 582nm[/color] [color=#fe0]583nm 584nm 585nm 586nm 587nm 588nm[/color] [color=#fd0]589nm 590nm 591nm 592nm 593nm[/color] [color=#fc0]594nm 595nm 596nm 597nm 598nm[/color] [color=#fb0]599nm
600nm 601nm 602nm 603nm[/color] [color=#fa0]604nm 605nm 606nm 607nm 608nm[/color] [color=#f90]609nm 610nm 611nm 612nm 613nm[/color] [color=#f80]614nm 615nm 616nm 617nm[/color] [color=#f70]618nm 619nm
620nm 621nm 622nm[/color] [color=#f60]623nm 624nm 625nm 626nm[/color] [color=#f50]627nm 628nm 629nm 630nm[/color] [color=#f40]631nm 632nm 633nm 634nm[/color] [color=#f30]635nm 636nm 637nm 638nm[/color] [color=#f20]639nm
640nm 641nm[/color] [color=#f10]642nm 643nm 644nm[/color] [color=#f00]645nm 646nm 647nm 648nm 649nm 650nm 651nm 652nm 653nm 654nm 655nm 656nm 657nm 658nm 659nm
660nm 661nm 662nm 663nm 664nm 665nm 666nm 667nm 668nm 669nm 670nm 671nm 672nm 673nm 674nm 675nm 676nm 677nm 678nm 679nm
680nm 681nm 682nm 683nm 684nm 685nm 686nm 687nm 688nm 689nm 690nm 691nm 692nm 693nm 694nm 695nm 696nm 697nm 698nm 699nm
700nm 701nm 702nm 703nm 704nm[/color] [color=#e00]705nm 706nm 707nm 708nm 709nm 710nm 711nm 712nm 713nm 714nm[/color] [color=#d00]715nm 716nm 717nm 718nm 719nm
720nm 721nm 722nm 723nm[/color] [color=#c00]724nm 725nm 726nm 727nm 728nm 729nm 730nm 731nm 732nm[/color] [color=#b00]733nm 734nm 735nm 736nm 737nm 738nm 739nm
740nm 741nm[/color] [color=#a00]742nm 743nm 744nm 745nm 746nm 747nm 748nm 749nm[/color] [color=#900]750nm 751nm 752nm 753nm 754nm 755nm 756nm 757nm 758nm[/color] [color=#800]759nm
760nm 761nm 762nm 763nm 764nm 765nm 766nm[/color] [color=#700]767nm 768nm 769nm 770nm 771nm 772nm 773nm 774nm[/color] [color=#600]775nm 776nm 777nm 778nm 779nm[/color]

If you need a finer gradient, you can also use these more precise 24-bit color codes instead of the 12-bit short codes above.

380nm 381nm 382nm 383nm 384nm 385nm 386nm 387nm 388nm 389nm 390nm 391nm 392nm 393nm 394nm 395nm 396nm 397nm 398nm 399nm
400nm 401nm 402nm 403nm 404nm 405nm 406nm 407nm 408nm 409nm 410nm 411nm 412nm 413nm 414nm 415nm 416nm 417nm 418nm 419nm
420nm 421nm 422nm 423nm 424nm 425nm 426nm 427nm 428nm 429nm 430nm 431nm 432nm 433nm 434nm 435nm 436nm 437nm 438nm 439nm
440nm 441nm 442nm 443nm 444nm 445nm 446nm 447nm 448nm 449nm 450nm 451nm 452nm 453nm 454nm 455nm 456nm 457nm 458nm 459nm
460nm 461nm 462nm 463nm 464nm 465nm 466nm 467nm 468nm 469nm 470nm 471nm 472nm 473nm 474nm 475nm 476nm 477nm 478nm 479nm
480nm 481nm 482nm 483nm 484nm 485nm 486nm 487nm 488nm 489nm 490nm 491nm 492nm 493nm 494nm 495nm 496nm 497nm 498nm 499nm
500nm 501nm 502nm 503nm 504nm 505nm 506nm 507nm 508nm 509nm 510nm 511nm 512nm 513nm 514nm 515nm 516nm 517nm 518nm 519nm
520nm 521nm 522nm 523nm 524nm 525nm 526nm 527nm 528nm 529nm 530nm 531nm 532nm 533nm 534nm 535nm 536nm 537nm 538nm 539nm
540nm 541nm 542nm 543nm 544nm 545nm 546nm 547nm 548nm 549nm 550nm 551nm 552nm 553nm 554nm 555nm 556nm 557nm 558nm 559nm
560nm 561nm 562nm 563nm 564nm 565nm 566nm 567nm 568nm 569nm 570nm 571nm 572nm 573nm 574nm 575nm 576nm 577nm 578nm 579nm
580nm 581nm 582nm 583nm 584nm 585nm 586nm 587nm 588nm 589nm 590nm 591nm 592nm 593nm 594nm 595nm 596nm 597nm 598nm 599nm
600nm 601nm 602nm 603nm 604nm 605nm 606nm 607nm 608nm 609nm 610nm 611nm 612nm 613nm 614nm 615nm 616nm 617nm 618nm 619nm
620nm 621nm 622nm 623nm 624nm 625nm 626nm 627nm 628nm 629nm 630nm 631nm 632nm 633nm 634nm 635nm 636nm 637nm 638nm 639nm
640nm 641nm 642nm 643nm 644nm 645nm 646nm 647nm 648nm 649nm 650nm 651nm 652nm 653nm 654nm 655nm 656nm 657nm 658nm 659nm
660nm 661nm 662nm 663nm 664nm 665nm 666nm 667nm 668nm 669nm 670nm 671nm 672nm 673nm 674nm 675nm 676nm 677nm 678nm 679nm
680nm 681nm 682nm 683nm 684nm 685nm 686nm 687nm 688nm 689nm 690nm 691nm 692nm 693nm 694nm 695nm 696nm 697nm 698nm 699nm
700nm 701nm 702nm 703nm 704nm 705nm 706nm 707nm 708nm 709nm 710nm 711nm 712nm 713nm 714nm 715nm 716nm 717nm 718nm 719nm
720nm 721nm 722nm 723nm 724nm 725nm 726nm 727nm 728nm 729nm 730nm 731nm 732nm 733nm 734nm 735nm 736nm 737nm 738nm 739nm
740nm 741nm 742nm 743nm 744nm 745nm 746nm 747nm 748nm 749nm 750nm 751nm 752nm 753nm 754nm 755nm 756nm 757nm 758nm 759nm
760nm 761nm 762nm 763nm 764nm 765nm 766nm 767nm 768nm 769nm 770nm 771nm 772nm 773nm 774nm 775nm 776nm 777nm 778nm 779nm

[color=#610061]380nm[/color] [color=#640066]381nm[/color] [color=#67006a]382nm[/color] [color=#6a006f]383nm[/color] [color=#6d0073]384nm[/color] [color=#6f0077]385nm[/color] [color=#72007c]386nm[/color] [color=#740080]387nm[/color] [color=#760084]388nm[/color] [color=#780088]389nm[/color] [color=#79008d]390nm[/color] [color=#7b0091]391nm[/color] [color=#7c0095]392nm[/color] [color=#7e0099]393nm[/color] [color=#7f009d]394nm[/color] [color=#8000a1]395nm[/color] [color=#8100a5]396nm[/color] [color=#8100a9]397nm[/color] [color=#8200ad]398nm[/color] [color=#8200b1]399nm[/color] 
[color=#8300b5]400nm[/color] [color=#8300b9]401nm[/color] [color=#8300bc]402nm[/color] [color=#8300c0]403nm[/color] [color=#8200c4]404nm[/color] [color=#8200c8]405nm[/color] [color=#8100cc]406nm[/color] [color=#8100cf]407nm[/color] [color=#8000d3]408nm[/color] [color=#7f00d7]409nm[/color] [color=#7e00db]410nm[/color] [color=#7c00de]411nm[/color] [color=#7b00e2]412nm[/color] [color=#7900e6]413nm[/color] [color=#7800e9]414nm[/color] [color=#7600ed]415nm[/color] [color=#7400f1]416nm[/color] [color=#7100f4]417nm[/color] [color=#6f00f8]418nm[/color] [color=#6d00fb]419nm[/color] 
[color=#6a00ff]420nm[/color] [color=#6600ff]421nm[/color] [color=#6100ff]422nm[/color] [color=#5d00ff]423nm[/color] [color=#5900ff]424nm[/color] [color=#5400ff]425nm[/color] [color=#5000ff]426nm[/color] [color=#4b00ff]427nm[/color] [color=#4600ff]428nm[/color] [color=#4200ff]429nm[/color] [color=#3d00ff]430nm[/color] [color=#3800ff]431nm[/color] [color=#3300ff]432nm[/color] [color=#2e00ff]433nm[/color] [color=#2800ff]434nm[/color] [color=#2300ff]435nm[/color] [color=#1d00ff]436nm[/color] [color=#1700ff]437nm[/color] [color=#1100ff]438nm[/color] [color=#0a00ff]439nm[/color] 
[color=#0000ff]440nm[/color] [color=#000bff]441nm[/color] [color=#0013ff]442nm[/color] [color=#001bff]443nm[/color] [color=#0022ff]444nm[/color] [color=#0028ff]445nm[/color] [color=#002fff]446nm[/color] [color=#0035ff]447nm[/color] [color=#003bff]448nm[/color] [color=#0041ff]449nm[/color] [color=#0046ff]450nm[/color] [color=#004cff]451nm[/color] [color=#0051ff]452nm[/color] [color=#0057ff]453nm[/color] [color=#005cff]454nm[/color] [color=#0061ff]455nm[/color] [color=#0066ff]456nm[/color] [color=#006cff]457nm[/color] [color=#0071ff]458nm[/color] [color=#0076ff]459nm[/color] 
[color=#007bff]460nm[/color] [color=#007fff]461nm[/color] [color=#0084ff]462nm[/color] [color=#0089ff]463nm[/color] [color=#008eff]464nm[/color] [color=#0092ff]465nm[/color] [color=#0097ff]466nm[/color] [color=#009cff]467nm[/color] [color=#00a0ff]468nm[/color] [color=#00a5ff]469nm[/color] [color=#00a9ff]470nm[/color] [color=#00aeff]471nm[/color] [color=#00b2ff]472nm[/color] [color=#00b7ff]473nm[/color] [color=#00bbff]474nm[/color] [color=#00c0ff]475nm[/color] [color=#00c4ff]476nm[/color] [color=#00c8ff]477nm[/color] [color=#00cdff]478nm[/color] [color=#00d1ff]479nm[/color] 
[color=#00d5ff]480nm[/color] [color=#00daff]481nm[/color] [color=#00deff]482nm[/color] [color=#00e2ff]483nm[/color] [color=#00e6ff]484nm[/color] [color=#00eaff]485nm[/color] [color=#00efff]486nm[/color] [color=#00f3ff]487nm[/color] [color=#00f7ff]488nm[/color] [color=#00fbff]489nm[/color] [color=#00ffff]490nm[/color] [color=#00fff5]491nm[/color] [color=#00ffea]492nm[/color] [color=#00ffe0]493nm[/color] [color=#00ffd5]494nm[/color] [color=#00ffcb]495nm[/color] [color=#00ffc0]496nm[/color] [color=#00ffb5]497nm[/color] [color=#00ffa9]498nm[/color] [color=#00ff9e]499nm[/color] 
[color=#00ff92]500nm[/color] [color=#00ff87]501nm[/color] [color=#00ff7b]502nm[/color] [color=#00ff6e]503nm[/color] [color=#00ff61]504nm[/color] [color=#00ff54]505nm[/color] [color=#00ff46]506nm[/color] [color=#00ff38]507nm[/color] [color=#00ff28]508nm[/color] [color=#00ff17]509nm[/color] [color=#00ff00]510nm[/color] [color=#09ff00]511nm[/color] [color=#0fff00]512nm[/color] [color=#15ff00]513nm[/color] [color=#1aff00]514nm[/color] [color=#1fff00]515nm[/color] [color=#24ff00]516nm[/color] [color=#28ff00]517nm[/color] [color=#2dff00]518nm[/color] [color=#31ff00]519nm[/color] 
[color=#36ff00]520nm[/color] [color=#3aff00]521nm[/color] [color=#3eff00]522nm[/color] [color=#42ff00]523nm[/color] [color=#46ff00]524nm[/color] [color=#4aff00]525nm[/color] [color=#4eff00]526nm[/color] [color=#52ff00]527nm[/color] [color=#56ff00]528nm[/color] [color=#5aff00]529nm[/color] [color=#5eff00]530nm[/color] [color=#61ff00]531nm[/color] [color=#65ff00]532nm[/color] [color=#69ff00]533nm[/color] [color=#6cff00]534nm[/color] [color=#70ff00]535nm[/color] [color=#73ff00]536nm[/color] [color=#77ff00]537nm[/color] [color=#7bff00]538nm[/color] [color=#7eff00]539nm[/color] 
[color=#81ff00]540nm[/color] [color=#85ff00]541nm[/color] [color=#88ff00]542nm[/color] [color=#8cff00]543nm[/color] [color=#8fff00]544nm[/color] [color=#92ff00]545nm[/color] [color=#96ff00]546nm[/color] [color=#99ff00]547nm[/color] [color=#9cff00]548nm[/color] [color=#a0ff00]549nm[/color] [color=#a3ff00]550nm[/color] [color=#a6ff00]551nm[/color] [color=#a9ff00]552nm[/color] [color=#adff00]553nm[/color] [color=#b0ff00]554nm[/color] [color=#b3ff00]555nm[/color] [color=#b6ff00]556nm[/color] [color=#b9ff00]557nm[/color] [color=#bdff00]558nm[/color] [color=#c0ff00]559nm[/color] 
[color=#c3ff00]560nm[/color] [color=#c6ff00]561nm[/color] [color=#c9ff00]562nm[/color] [color=#ccff00]563nm[/color] [color=#cfff00]564nm[/color] [color=#d2ff00]565nm[/color] [color=#d5ff00]566nm[/color] [color=#d8ff00]567nm[/color] [color=#dbff00]568nm[/color] [color=#deff00]569nm[/color] [color=#e1ff00]570nm[/color] [color=#e4ff00]571nm[/color] [color=#e7ff00]572nm[/color] [color=#eaff00]573nm[/color] [color=#edff00]574nm[/color] [color=#f0ff00]575nm[/color] [color=#f3ff00]576nm[/color] [color=#f6ff00]577nm[/color] [color=#f9ff00]578nm[/color] [color=#fcff00]579nm[/color] 
[color=#ffff00]580nm[/color] [color=#fffc00]581nm[/color] [color=#fff900]582nm[/color] [color=#fff600]583nm[/color] [color=#fff200]584nm[/color] [color=#ffef00]585nm[/color] [color=#ffec00]586nm[/color] [color=#ffe900]587nm[/color] [color=#ffe600]588nm[/color] [color=#ffe200]589nm[/color] [color=#ffdf00]590nm[/color] [color=#ffdc00]591nm[/color] [color=#ffd900]592nm[/color] [color=#ffd500]593nm[/color] [color=#ffd200]594nm[/color] [color=#ffcf00]595nm[/color] [color=#ffcb00]596nm[/color] [color=#ffc800]597nm[/color] [color=#ffc500]598nm[/color] [color=#ffc100]599nm[/color] 
[color=#ffbe00]600nm[/color] [color=#ffbb00]601nm[/color] [color=#ffb700]602nm[/color] [color=#ffb400]603nm[/color] [color=#ffb000]604nm[/color] [color=#ffad00]605nm[/color] [color=#ffa900]606nm[/color] [color=#ffa600]607nm[/color] [color=#ffa200]608nm[/color] [color=#ff9f00]609nm[/color] [color=#ff9b00]610nm[/color] [color=#ff9800]611nm[/color] [color=#ff9400]612nm[/color] [color=#ff9100]613nm[/color] [color=#ff8d00]614nm[/color] [color=#ff8900]615nm[/color] [color=#ff8600]616nm[/color] [color=#ff8200]617nm[/color] [color=#ff7e00]618nm[/color] [color=#ff7b00]619nm[/color] 
[color=#ff7700]620nm[/color] [color=#ff7300]621nm[/color] [color=#ff6f00]622nm[/color] [color=#ff6b00]623nm[/color] [color=#ff6700]624nm[/color] [color=#ff6300]625nm[/color] [color=#ff5f00]626nm[/color] [color=#ff5b00]627nm[/color] [color=#ff5700]628nm[/color] [color=#ff5300]629nm[/color] [color=#ff4f00]630nm[/color] [color=#ff4b00]631nm[/color] [color=#ff4600]632nm[/color] [color=#ff4200]633nm[/color] [color=#ff3e00]634nm[/color] [color=#ff3900]635nm[/color] [color=#ff3400]636nm[/color] [color=#ff3000]637nm[/color] [color=#ff2b00]638nm[/color] [color=#ff2600]639nm[/color] 
[color=#ff2100]640nm[/color] [color=#ff1b00]641nm[/color] [color=#ff1600]642nm[/color] [color=#ff1000]643nm[/color] [color=#ff0900]644nm[/color] [color=#ff0000]645nm[/color] [color=#ff0000]646nm[/color] [color=#ff0000]647nm[/color] [color=#ff0000]648nm[/color] [color=#ff0000]649nm[/color] [color=#ff0000]650nm[/color] [color=#ff0000]651nm[/color] [color=#ff0000]652nm[/color] [color=#ff0000]653nm[/color] [color=#ff0000]654nm[/color] [color=#ff0000]655nm[/color] [color=#ff0000]656nm[/color] [color=#ff0000]657nm[/color] [color=#ff0000]658nm[/color] [color=#ff0000]659nm[/color] 
[color=#ff0000]660nm[/color] [color=#ff0000]661nm[/color] [color=#ff0000]662nm[/color] [color=#ff0000]663nm[/color] [color=#ff0000]664nm[/color] [color=#ff0000]665nm[/color] [color=#ff0000]666nm[/color] [color=#ff0000]667nm[/color] [color=#ff0000]668nm[/color] [color=#ff0000]669nm[/color] [color=#ff0000]670nm[/color] [color=#ff0000]671nm[/color] [color=#ff0000]672nm[/color] [color=#ff0000]673nm[/color] [color=#ff0000]674nm[/color] [color=#ff0000]675nm[/color] [color=#ff0000]676nm[/color] [color=#ff0000]677nm[/color] [color=#ff0000]678nm[/color] [color=#ff0000]679nm[/color] 
[color=#ff0000]680nm[/color] [color=#ff0000]681nm[/color] [color=#ff0000]682nm[/color] [color=#ff0000]683nm[/color] [color=#ff0000]684nm[/color] [color=#ff0000]685nm[/color] [color=#ff0000]686nm[/color] [color=#ff0000]687nm[/color] [color=#ff0000]688nm[/color] [color=#ff0000]689nm[/color] [color=#ff0000]690nm[/color] [color=#ff0000]691nm[/color] [color=#ff0000]692nm[/color] [color=#ff0000]693nm[/color] [color=#ff0000]694nm[/color] [color=#ff0000]695nm[/color] [color=#ff0000]696nm[/color] [color=#ff0000]697nm[/color] [color=#ff0000]698nm[/color] [color=#ff0000]699nm[/color] 
[color=#ff0000]700nm[/color] [color=#fd0000]701nm[/color] [color=#fb0000]702nm[/color] [color=#fa0000]703nm[/color] [color=#f80000]704nm[/color] [color=#f60000]705nm[/color] [color=#f40000]706nm[/color] [color=#f20000]707nm[/color] [color=#f10000]708nm[/color] [color=#ef0000]709nm[/color] [color=#ed0000]710nm[/color] [color=#eb0000]711nm[/color] [color=#e90000]712nm[/color] [color=#e80000]713nm[/color] [color=#e60000]714nm[/color] [color=#e40000]715nm[/color] [color=#e20000]716nm[/color] [color=#e00000]717nm[/color] [color=#de0000]718nm[/color] [color=#dc0000]719nm[/color] 
[color=#db0000]720nm[/color] [color=#d90000]721nm[/color] [color=#d70000]722nm[/color] [color=#d50000]723nm[/color] [color=#d30000]724nm[/color] [color=#d10000]725nm[/color] [color=#cf0000]726nm[/color] [color=#ce0000]727nm[/color] [color=#cc0000]728nm[/color] [color=#ca0000]729nm[/color] [color=#c80000]730nm[/color] [color=#c60000]731nm[/color] [color=#c40000]732nm[/color] [color=#c20000]733nm[/color] [color=#c00000]734nm[/color] [color=#be0000]735nm[/color] [color=#bc0000]736nm[/color] [color=#ba0000]737nm[/color] [color=#b90000]738nm[/color] [color=#b70000]739nm[/color] 
[color=#b50000]740nm[/color] [color=#b30000]741nm[/color] [color=#b10000]742nm[/color] [color=#af0000]743nm[/color] [color=#ad0000]744nm[/color] [color=#ab0000]745nm[/color] [color=#a90000]746nm[/color] [color=#a70000]747nm[/color] [color=#a50000]748nm[/color] [color=#a30000]749nm[/color] [color=#a10000]750nm[/color] [color=#9f0000]751nm[/color] [color=#9d0000]752nm[/color] [color=#9b0000]753nm[/color] [color=#990000]754nm[/color] [color=#970000]755nm[/color] [color=#950000]756nm[/color] [color=#930000]757nm[/color] [color=#910000]758nm[/color] [color=#8f0000]759nm[/color] 
[color=#8d0000]760nm[/color] [color=#8a0000]761nm[/color] [color=#880000]762nm[/color] [color=#860000]763nm[/color] [color=#840000]764nm[/color] [color=#820000]765nm[/color] [color=#800000]766nm[/color] [color=#7e0000]767nm[/color] [color=#7c0000]768nm[/color] [color=#7a0000]769nm[/color] [color=#770000]770nm[/color] [color=#750000]771nm[/color] [color=#730000]772nm[/color] [color=#710000]773nm[/color] [color=#6f0000]774nm[/color] [color=#6d0000]775nm[/color] [color=#6a0000]776nm[/color] [color=#680000]777nm[/color] [color=#660000]778nm[/color] [color=#640000]779nm[/color]

References:

Online converter @ https://academo.org/demos/wavelength-to-colour-relationship/
Another converter @ Wavelength to RGB color conversion
Pascal source code @ efg's Computer Lab: Spectra Lab Report
And in FORTRAN @ Spectra Code
Some more deep reading on the subject @ Color Science

And a thanks to ZRaffleticket for pointing me to these resources.

 

[diachi]

There's a website that spits out hex colour codes when you enter a wavelength...

https://academo.org/demos/wavelength-to-colour-relationship/

Edit: I see you linked that at the bottom of your post. Easier just to punch your numbers in there than it is to refer to a big list...

Appreciate the effort though. :beer:

 

[raccoon]

Since there was no forum post on this matter, at all, that I could find, I figured I'd make a post and fill it up with a meaningful quick reference at the same time.

I didn't want to create a whole forum post just to share the links to other webpages that might not be there tomorrow.

Indeed, the only wavelength to rgb converter I could find from initial Google searching was a 404 page.

 

[diachi]

Since there was no forum post on this matter, at all, that I could find, I figured I'd make a post and fill it up with a meaningful quick reference at the same time.

I didn't want to create a whole forum post just to share the links to other webpages that might not be there tomorrow.

Indeed, the only wavelength to rgb converter I could find from initial Google searching was a 404 page.

There's also these:

Wavelength to RGB / HEX Calculator

Wolfram|Alpha Widgets: "Convert Wavelength to Color" - Free Physics Widget

The Wolfram one doesn't seem to be working.

Search query was "wavelength to hex".

:beer:

 

[Gazen]

Thanks, knew about the conversion but not how to apply it to forum posts.

 

[raccoon]

There's also these:

Wavelength to RGB / HEX Calculator

Wolfram|Alpha Widgets: "Convert Wavelength to Color" - Free Physics Widget

The Wolfram one doesn't seem to be working.

Search query was "wavelength to hex".

:beer:

Yeah, I noticed the wolfram one was broken as well.

Curious though, the Wavelength Calculator you linked to doesn't use the same gamma factor as the ones above. I compiled the spectrum from their math and it comes out a bit different. Maybe darker, or shifted slightly.

Mine:: 460nm 461nm 462nm 463nm 464nm 465nm 466nm 467nm 468nm 469nm 470nm 471nm 472nm 473nm 474nm 475nm 476nm 477nm 478nm 479nm
Theirs:460nm 461nm 462nm 463nm 464nm 465nm 466nm 467nm 468nm 469nm 470nm 471nm 472nm 473nm 474nm 475nm 476nm 477nm 478nm 479nm

Mine:: 600nm 601nm 602nm 603nm 604nm 605nm 606nm 607nm 608nm 609nm 610nm 611nm 612nm 613nm 614nm 615nm 616nm 617nm 618nm 619nm
Theirs:600nm 601nm 602nm 603nm 604nm 605nm 606nm 607nm 608nm 609nm 610nm 611nm 612nm 613nm 614nm 615nm 616nm 617nm 618nm 619nm

Anyway, thanks for the heads up! I wonder what other spectrum approximations people are using. (Hint: share yours)

 

[diachi]

Yeah, I noticed the wolfram one was broken as well.

Curious though, the Wavelength Calculator you linked to doesn't use the same gamma factor as the ones above. I compiled the spectrum from their math and it comes out a bit different. Maybe darker, or shifted slightly.

Mine:: 460nm 461nm 462nm 463nm 464nm 465nm 466nm 467nm 468nm 469nm 470nm 471nm 472nm 473nm 474nm 475nm 476nm 477nm 478nm 479nm
Theirs:460nm 461nm 462nm 463nm 464nm 465nm 466nm 467nm 468nm 469nm 470nm 471nm 472nm 473nm 474nm 475nm 476nm 477nm 478nm 479nm

Mine:: 600nm 601nm 602nm 603nm 604nm 605nm 606nm 607nm 608nm 609nm 610nm 611nm 612nm 613nm 614nm 615nm 616nm 617nm 618nm 619nm
Theirs:600nm 601nm 602nm 603nm 604nm 605nm 606nm 607nm 608nm 609nm 610nm 611nm 612nm 613nm 614nm 615nm 616nm 617nm 618nm 619nm

Anyway, thanks for the heads up! I wonder what other spectrum approximations people are using. (Hint: share yours)

Yeah, they're a little different. I find the academo.org converter is more accurate, of course that'll vary depending on your display.

 

[CurtisOliver]

Yes, I just use the web converter tools. Nice effort however, and your time taken is appreciated.
Just looking at a block of text, compared to typing in the wavelength you want is a lot more tedious IMO.
The only thing I noticed that could be useful is that you go beyond 700nm. :beer:

 

[raccoon]

Yes, I just use the web converter tools. Nice effort however, and your time taken is appreciated.
Just looking at a block of text, compared to typing in the wavelength you want is a lot more tedious IMO.
The only thing I noticed that could be useful is that you go beyond 700nm. :beer:

Well, it really twas no big effort on my part. I enjoyed writing the script, and it spat the output for me. A little cleanup in Notepadd++ with a regular expression find/replace and done.

You can quickly find the wavelength by hitting Ctrl+F in your browser. And now that it's hosted on this forum, it will be still available in 10 years when the other websites are not. Should never rely on external resources... like Photobucket.

 

[CurtisOliver]

Good points, and good work. :beer: +rep

 

[paul1598419]

Also knew about the sites. But, it was a nice effort on your part to bring it to the attention of those who might not have been aware. I am often too lazy to worry about the colors in my signature as I don't update it very often. Usually finding the room to add something new is a larger problem for me.