Oh man, color, there is a ton I don't understand, but I can share something I have learned. [link] When a lot of people paint things they tend to think "color + black" for shadow or "color + white" for highlight. For example if it were a red object, they would paint it red with a darker red for shadow and a red with more white in it for highlights. It's not bad, but that's thinking of color more as value (dark, light, midtone stuff). What gives a color more life is other colors.
For example, if you look at something like fire: [link] As it gets brighter, it moves from red, to orange, to orange yellow, to yellow, and then to white. It's not just a brighter red. And this example of trees: [link] You notice how it's not just green, it goes from a yellow green, to green, to a bluish green.
I would suggest looking at photographs, and real life instances and study the colors. Obviously, different lighting conditions affect things. Study some of your favorite artists work too, even bring it into photoshop and color pick it and study their palette. On the engineer one, I was studying this piece [link] by Jay Axer. You can see as the red clothes move towards the light, they have more orange and yellow in them. I also noticed his highlights, I thought they were a cool white, but they are actually just a really gray red. That has to do with color relativity. So applied that to this piece I did, the highlights on the back are just really grayed out brown.
So basically, study artists and how light works in the real world and apply it to your work. I hope that made sense.
That actually makes a lot of sense. I haven't really taken the time to study color, nor have I ever thought of it in this way. I think that, perhaps, I should begin to learn how to do this. Your examples helped a lot, man, thank you.
Also in the words of GLaDOS: "I'm making a note here, huge success."
Seriously, excellent job. I envy people who can make, like, one brushstroke (for example, on the shoulder blades) with a color you wouldn't expect to fit into the local color, and it just looks perfect. This is great!