So let's say I wanted to make it look like it was night time, how would I do that?
Well the highest is 255. If you have 255 for Red, Green, and Blue then it would look white. What you would have to do is make it a low number, but not too low cause then it will look black.
To give it a night time feel, make sure the blue is a little higher then the rest, so it stands out and gives it that dark blue night lighting.
Hope that helps.