[Jimbee (OP)]

I just know black is the absence of all color. When I was still in GS I read that in a trivia book. The book said when you are looking at the print in this book you think you are seeing black. But actually no light is being reflected at all to your retina. And then you mind inserts that color or shade, black. And white I am pretty sure is when all the colors of the spectrum are reflected back at once.

So what is gray then? It is the two colors or shades mixed together. Which doesn't make sense. (Also while I'm asking, are black, white and gray colors? When I was in GS the teachers used to correct us and say they were really "shades". Are they? And what does that mean?)

[paul cotter]

First off black is the absence of light. What is called white light depends on the colour temperature of the source with higher temperatures producing a bluish white light and lower temperatures producing a redder type. Gray(grey) is just a diminished reflection of white light with no colour alteration to the incident light.

[Petrochemicals]

Dolphins.

In people monochrome vision they only see in the grey scale, It is just a contrast between lighter and darker sources of light for them. Grey in people who can see normally is probably to do with the rods in the eyes which are used for low level light and movement, unlike the cones which are colour and detail.