Color perception

No color tells you something itself.
It's tempting to think that red = danger, gray = boring, blue = business, but these are meanings attached by people, not integral ot the colors itself (there are however certain customs in use of color, but these can be different in different parts of the world, for instance - people wear white color at funerals in Buddhist cultures).

A good answer to someone who says "red means danger" is to ask, why the hell do you eat strawberries then?