Hi Boa, lately I've been having some trouble picking out colors for a painting. Do you mind giving any tips/tricks for building a color palette? Thank you. ( I love your designs - squeals （≧∇≦））
Terreverte did a great and comprehensible writeup on color and light that I can really recommend.
Also this video called “Understanding Colours" is really good.
If you like art books, I can recommend Color and Light by James Gurney. He also has a blog over here. Also from his blog are his articles about Gamut Mapping and while they might be confusing at first, they really helped me pick colors, especially because I love to clash many bright and vibrant colours in one image.
This Dota2 character design guide talks about colors and color matching to draw the heroes and it shows how interesting and diverse color combinations can be.
And finally, paletton, a side to create easy color palettes.