Richie's the last chance sketchbook

[Adam Lina]

Nice efforts so far. I see you did some value studies which is great. If you are having trouble eyeballing colors Id suggest trying to do value studies from full color references. That way you have to train your eye to see colors as their value. The human eye is much more sensitive to values than it is to hues of color. One of the best books on learning color is James Gurney's Color and Light. So I'd highly recommend picking that up. He talks a bit about traditional painting in it but most of the book applies to digital as well.

One of best lessons I learned from it is how color has three dimensions to it. Value, hue and saturation (also known as chroma). Value as you know is how light or dark it is. Hue is its position on the color wheel as in a greenish hue or a redish hue ect. Saturation is how pure a color is versus how grayed out it is. A hue like yellow at its highest saturation is as pure yellow as it can get and its base value if converted to gray scale is a very light gray. While a blue hue at its highest saturation has a dark gray base value. So when picking colors consider each of the 3 dimensions one at a time, starting with value. That way you narrow the scope of colors to pick from instead of trying to pick a color from out of ALL colors which can be very overwhelming for a beginner especially.

Sorry for the wall of text :) TLDR version: Read Color and Light and do more value studies.