First off let me say this is based ONLY on what I have noticed or read...

Go outside at dusk and look for colors. I have noticed whites are the first to fade out and disappear as the light dims. The darker the color the longer you can see it.

As I understand colors are created by the material reflecting that part of the light spectrum. So if you see red all other colors of the light spectrum are not reflected. Therefore as there is less light there is less to reflect and the colors begin to turn gray. Black remains the same no matter what light level and, even in next to zero light, can still be seen.

That is why darker colors are used in low light or stained water.

OK, now if someone that knows about this stuff wants to chime in and tell me I?m full of it, please educate me!