Europe and Oceania tend to be more commonly green or blue colored, whereas Asia, Africa, and Latin America tend to be almost exclusively brown colored. And for whatever weird reason, North Americans are often brown colored too, even including the white people.
This actually explains quite a lot of things, like why sunglasses tend to be much more commonly used in the west and not so much in all other cultures, why LED lights and other lights in general in the west are significantly weaker compared to here in Asia, why there's so much more street light here than there are in Europe, and so on.
@ryo idk whether it's the language affecting vision or vise versa, but different nations perceive colors differently as well; and both sexes see them differently, too
like, I read that 青い is both blue and green (at least when it comes to veggies?), and English speakers have blue as a wider range of colors while in Russian синий and голубой are both blue, but differ greatly
@matana Green was (and in some instances still is) considered to be a shade of blue, but not exactly blue.
Actually, when playing around with the color picker in GIMP at one point, I actually noticed that there are really only 2 colors: warm and cold. And everything else is just a shade of either of the 2. For example, red, yellow, orange, brown, and pink are all warm colors, whereas blue, green, cyan, lime, and purple are all cold colors. In an RGB setting, the higher the red value compared to green and blue, the warmer the color, but the higher the green and/or blue value compared to red, the colder the color.
Black, grey, and white are basically shades of light rather than shades of color.