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Monitors produce a mixture of blue and red. This is the definition of purple. Our monitors are not capable of producing violet. There is no "kind of" violet to
by peteey 8y ago
Monitors produce a mixture of blue and red. This is the definition of purple. Our monitors are not capable of producing violet. There is no "kind of" violet to discuss.
The article deceptively passes off purple for violet, and shows magenta for contrast. It is wrong.
- OscarCunningham 8y agoI'm using a definition of colour under which two lights are the same colour if they look the same to a typical human, whereas you're using a definition where two lights are only the same colour if they have exactly the same spectrum. Can we at least agree that computers can produce a colour that looks the same as a spectral violet light reflected off grey paper?
- deleted 8y ago[deleted]
- seandougall 8y agoSpectral colors are _all_ outside of the sRGB gamut. So apart from your needlessly aggressive tone, I’m not sure what you’re getting at.
- peteey 8y agoColors are not purely spectral. Pink and brown are colors that must be mixtures. Black is no color. Normally I wouldn't care, but the point of article is the difference between mixtures and wavelength. The point of the post is semantics. Some child just learning the colors gets a free pass, but if you put up a website to explain something and its wrong, I think its reasonable to "aggressively" say so.
- mschuetz 8y ago> Black is no color It is, though.
- reitanqild 8y agoPhysics defines black as "absorbs all light" or something. Painters have a range of black colours. Both are right in the right context.
- anyfoo 8y agoI suspect they meant "in the spectral color space". Claiming that it is no color in general is actually a pet peeve of mine: You're right, of course black is a color, in the right context. Colors are not singularly defined as some point across the spectral scale, where there is indeed no black and white, but can be interpreted through many other common, reasonable, and useful definitions as well. For example, it is perfectly reasonable to define "color" as a point in a 3-dimensional space, for example as RGB or HSV triples, which are very popular and useful definitions in many contexts. Black, then, is (0,0,0). You can also define color as an element of a particular set of available colors. If you had a "black" car, and someone asks you what color your car is, would they seriously answer with "my car does not have a color, it is black"? (Even ignoring the fact that that would most likely be a lie according to the physical definition, since the car is most certainly not perfectly black in the physical sense, but then what would you call it?)