I've read a few philosophers write that color theorists typically divide into
Clearly what is dependent on the existence of mental processes is not therefore illusory. Unlike many things, the existence of mental processes is dependent on the existence of mental processes. It does not follow that mental processes are illusory. But I think it should be said that there is little or nothing that philosophers have provided that could help us to understand what it means to say that a colour, the colour pink, for example, exists, or exists only, in the mind, or outside of it, for that matter. The mantis shrimp has at least eight colour receptors - it can also perceive circularly polarized light and its direction of rotation! - but the poor old thing does not have an awful lot in the way of a mind. Mind you, it can deliver a punch (with one hand!) at 10,000 g, enough to boil the water in front of it.