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FrozenGate by Avery

What's the wavelength of pure blue?

What's the wavelength of pure blue?

  • 430nm

    Votes: 0 0.0%

  • 435nm

    Votes: 1 2.1%

  • 440nm

    Votes: 0 0.0%

  • 445nm

    Votes: 4 8.5%

  • 450nm

    Votes: 8 17.0%

  • 455nm

    Votes: 2 4.3%

  • 460nm

    Votes: 21 44.7%

  • 465nm

    Votes: 5 10.6%

  • 470nm

    Votes: 2 4.3%

  • 475nm

    Votes: 4 8.5%
  • Total voters
    47
Atomicrox

Atomicrox

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Joined
Jun 22, 2011
Messages
2,431
Points
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Not asking which one you like the most, I'm asking which one you think is the purest shade of blue (as in not skewed towards violet or cyan).

Of course very few people have seen all of these, feel free to interpolate or guess based on the ones you have actually seen.
 





The question doesn't make sense. It like asking what's more square than a square?
Spectral colors are as pure as they can be.

Not asking which one you like the most
Click to expand...
You are asking for a judgement call which can't be objectively decided.
 
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I couldn't say for sure, I'm going from 445nm to 473nm... not a good estimate
 
steve001 said:
The question doesn't make sense. It like asking what's more square than a square?
Spectral colors are as pure as the can be.


You are asking for a judgement call which can't be objectively decided.
Click to expand...

It's a very simple question, you're making it more complicated than it needs to be. It's not scientific, he asking opinions of what we would say is true blue, the midpoint between green and cyan. What doesn't make sense about this?

Edit: My observation would be it's slightly below 445nm, unsure though.
 
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That's the point of asking here... It is a completely subjective question, therefore a lot of answers are needed to have an average of what WL people consider as a pure shade of blue.

By pure I don't mean saturated. I mean not skewed towards violet or cyan.

If you don't know the exact answer (and no one does) just make a guess :P
 
Its not an objective question a famous scientist Sir Isaac Newton after years of study determined and. added the 7th colour to the rainbow indigo which is 445nm ..true blue is 460-465nm by all further analysis much later as technology advanced ..we all perceive color slightly different but as a frequency 460-465nm is blue not indigo ...( there's only so much you can get of Google lol)
 
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I don't think I can say 450nm is more blue than 473nm. Both are blue, just different shades of blue.

It's the same as asking which apple tastes more like apple, green apple or red apple.
 
I have to say 475nm. When tuning down on the Omni, I get to 458, and it looks very violet. Although that's because I just compared it to everything above it, so I guess I can't answer without bias. Even 465 looks violet when tuning from green -> blue.
 
Last edited:
455nm is when I stop seeing purple, and 475nm is when I stop seeing green.
445nm looks purpleish (actual 445nm, not the 9mm diodes that are 450-455nm) and 480nm looks greenish.

Halfway between those two is 465nm. I imagine "pure" blue would be around that wavelength.
 
Very interesting results so far! As I expected we are getting an average way above 440nm.
 
440nm is purple! I wouldn't even consider that to be blue :p


At times like this I wish I had a free electron laser to test this out ;)
 
Interestingly 440nm is what the WL to RGB algorithm considers as pure blue (0x0000FF). Of course that's further complicated by monitor calibration and so..

This is one of the main reasons I made this poll. If response is good we might get a better WL to RGB algorithm in the end!


Yeah, I would like to play with one of those XD
 
I think the OP is asking about the shade of blue used in the RGB color model.
 
Not exactly, I know RGB colors aren't monochromatic but I suppose what I'm asking is which wavelength each person idealizes as blue, out of our current monitor constraints :P
 
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