The book figopedia is more like how you approach a model.where the highlights /shades fall,how and where to apply intermediate shades and things like that.there is ,in the second half of the book,however a section on color theory . Now if you're interested in how and what I've used for my blood reavers I used a recipe that David powel (baily03) uses only when it came to my shading I went down to deep blue which is beyond the chestnut deep shade he talks about using.look at his w I p and you'll find in there his recipe.it really is a very attractive one.