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Comment on Why is #FFFFFF white, but mixing red green and blue paint is black?

no_circumlocution@lemmy.world ⁨16⁩ ⁨hours⁩ ago

It is the difference between additive mixing and subtractive mixing. When you mix colors on a screen with RGB, you add light. When you mix pigments on a physical medium, you subtract the amount of light reflected (because each paint absorbs most light except the colors it reflects, which are what you see).

As a side note, when mixing in the subtractive color system, your primary colors are cyan, magenta, and yellow. That’s why a printer takes CMYK, for cyan, magenta, yellow, and black. In case you were wondering, ‘K’ here is black.

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fallaciousBasis@lemmy.world ⁨13⁩ ⁨minutes⁩ ago
K is key. It’s not necessarily black ink, but tends to be when printing on white stock.

If you’re printing on black stock, for instance, you’ll likely have white ink for the key.

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modus@lemmy.world ⁨7⁩ ⁨hours⁩ ago
Great explanation. Thank you.

Can you also tell me how a computer monitor makes Yellow when it only has RGB pixels?

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- no_circumlocution@lemmy.world ⁨5⁩ ⁨hours⁩ ago
  On a spectrum of visible light, yellow has a wavelength perfectly between red and green. Therefore, combining red and green, the average wavelength is the same as the wavelength of yellow.
  
  For reference: Image
  
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  - Mikina@programming.dev ⁨56⁩ ⁨minutes⁩ ago
    I’ve been wondering - how do you make brown? Don’t really see it on the spectrum.
    
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    fallaciousBasis@lemmy.world ⁨10⁩ ⁨minutes⁩ ago
    About 2 parts red to one part green.
    
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- HatchetHaro@pawb.social ⁨7⁩ ⁨hours⁩ ago
  red light + green light = yellow light
  
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