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Old 09-09-2008, 06:01 AM #1
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Default Laser color hexadecimals

I've been looking around, and it seems like alot of people here use the same hexadecimals for their laser colors in their sigs. I've noticed, and I'm sure it's just a coincidence, but I've noticed that a bunch of people are using the same hex's as me for 594 and 635.

So, I've been thinking, what do you all think of the hex's I'm using, how accurate are the colors I've chosen for my hex's?

660nm: color=red
635nm: color=#ff3300
594nm: color=#ffcc00
532nm: color=#04fc27
488nm: color=#21dafc
473nm: color=#0152ca
405nm: color=#990099

I'm thinking the 473 might need to be a tad brighter, and the 594 might need to be a bit yellower. Thoughts?


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Old 09-09-2008, 07:05 AM #2
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Default Re: Laser color hexadecimals

I just tried switching through the different forum templates, and the colors look completely different depending on what background color you are using. Additionally different monitors are going to have different color spaces, and everyone's environments have different lighting... brightness contributes a lot, since it dictates whether we are getting more information from our rods or our cones... our eyes may have subtly different frequency responses (the bandgap is pretty much the same for each type of cone in all human retinas, but we all have different proportions of red, green, and blue cones... and apparently some small percentage of women have a fourth type of cone that is sensitive to yellowish-orange)... it gets pretty complicated, not having any one 'correct' mapping.

There's a free program [link=www.efg2.com/Lab/ScienceAndEngineering/Spectra.htm]here[/link] that gives RGB values for wavelengths/frequencies of visible light according to one heuristic (unfortunately you'll need to convert the numbers to hex). But all of the issues above (and probably many more) affect those colors too, and to top it all off the same OS is rendering the graphics in your browser and the graphics in that program, all using what boils down to RGB... all that program gives you is somebody's idea of which wavelengths match which colors.

To my eyes your colors are pretty good, except for the lower two wavelengths... but I've tried tweaking the RGB for those to get colors that look more accurate to me, and the colors I am looking for just don't exist in the RGB colorspace. I think you are right about the brightness of 594 and 473 (405 too, in my opinion), but I can't figure out what to do about it. It might be fruitful to try using opacity and positioning to make composite overlaid colors, or using javascript to rapidly cycle through some different colors (which our eyes would average out)... I'll leave that exercise for someone more [s]stoned[/s]interested than me.
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Old 09-09-2008, 07:37 AM #3
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Default Re: Laser color hexadecimals

Quote:
Originally Posted by Foobario
I just tried switching through the different forum templates, and the colors look completely different depending on what background color you are using. Additionally different monitors are going to have different color spaces, and everyone's environments have different lighting... brightness contributes a lot, since it dictates whether we are getting more information from our rods or our cones... our eyes may have subtly different frequency responses (the bandgap is pretty much the same for each type of cone in all human retinas, but we all have different proportions of red, green, and blue cones... and apparently some small percentage of women have a fourth type of cone that is sensitive to yellowish-orange)... it gets pretty complicated, not having any one 'correct' mapping.

There's a free program [link=www.efg2.com/Lab/ScienceAndEngineering/Spectra.htm]here[/link] that gives RGB values for wavelengths/frequencies of visible light according to one heuristic (unfortunately you'll need to convert the numbers to hex). But all of the issues above (and probably many more) affect those colors too, and to top it all off the same OS is rendering the graphics in your browser and the graphics in that program, all using what boils down to RGB... all that program gives you is somebody's idea of which wavelengths match which colors.

To my eyes your colors are pretty good, except for the lower two wavelengths... but I've tried tweaking the RGB for those to get colors that look more accurate to me, and the colors I am looking for just don't exist in the RGB colorspace. I think you are right about the brightness of 594 and 473 (405 too, in my opinion), but I can't figure out what to do about it. It might be fruitful to try using opacity and positioning to make composite overlaid colors, or using javascript to rapidly cycle through some different colors (which our eyes would average out)... I'll leave that exercise for someone more [s]stoned[/s]interested than me.
I didn't even realize the board had other skins. Learn something new every day LOL. That program is pretty freakin' cool. I downloaded it, and according to that, I'm too orange on my yellow laser deal. Fine by me, I thought it looked too orangish. FFD500 it is for my new, yellow text. Have to work with my new name.
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