RGB codes use light mixing rules.

[futurebird@sauropods.win]

RGB codes use light mixing rules. This is fine, can take some getting used to if you are used to pigment.

RYB would be a primary color code scheme. It wouldn't cover the same range of colors. I'm thinking about how one would code a conversion function between the two from "first principals" ... I think RYBB would allow the same range of colors if "B" is black.

[ben@mastodon.lubar.me]

@futurebird I think blue having the same first letter as black is why they refer to black as "key" in CMYK

[futurebird@sauropods.win]

@ben

Makes sense. I think introducing CYMK to the mix would just make it more confusing?

Also I want to puzzle this out. But I don't understand why so many people are taught that Red Yellow and Blue are the primary colors?

That's the real issue. I will bother the art teachers tomorrow.

[oblomov@sociale.network]

@futurebird @ben the way I explain it is as additive versus subtractive composition. CMY combine by “subtracting more light from what is reflected from the (originally white) surface”; all of them together make black because you removed all components. RGB combine by “adding more light” from the darkness.