/ic/ - Artwork/Critique

>>2202413
It took me a few times to figure out what you were saying, but I think I got it.

Lighting.
The color of an object is Directly determined by its local color (Red apple) and its light source color (warm light). By mixing them together, you will get your "light-side-of-the-object" color. Then, the shadowed area will be cooler (in this situation) as well as other reflected light from other objects in the scene.
From this result, the color of the apple isn't technically RED it's a mixture of both Warm red (light plane/side) and Cool/Neutral red (shadow side). The red is what keeps the colors harmonized.

Here's the tricky part.
Shine a bright green light on your face/body in a dark area. Why does it look green? You know what RGB is? Well, the only light hitting the white object is 100% Green, leaving R and B at 0%. And, because your body absorbs (in direct sunlight) a certain variation of RGB and reflects the rest to everyone else's eye to make your skin tone. In this case with the green light in the dark room, and since (I'm assuming) you aren't Pure Jet Black, your body only absorbs the amount of Green light needed for its desired skin color, it in turn reflects the rest of it which is (for the sake of this example) 75%. That 75% of green is NOT being mixed with any other reflected Blues or Reds: creating your normal skin tone and making your skin color look unnaturally green.
I looked way too deep into the science of how light works. Don't make my mistake, although it is interesting, it is NOT worth your time going through all of this mess just to learn something that is easily learned through observation.

Anything can be ANY color under certain circumstances.
Just pay attention to your light sources and how intense they are. Also pay attention to the Local Color of the object, because that too will have an effect on the way it is perceived. A red apple will look BLACK under green light because a red apple cannot reflect Green or Blue light,