RRemeber there is no set way but what I advise are interaction of colors in the shading and highlighting by introducing colors compliments and analogies..for example first I look at the base color and say to myself what color on the (12 color wheel) does it come close to....I think we can all agree it's a rotted flesh which looks yellow ,beige,yellowgreen,etc....ok so what is the compliment of yellow it's a blue,could even have a bit of purple in iit..this can be 1) glazed in,blended in etc...OR WHAT I LIKE TO DO IS MIX THE COMPLIMENT WITH THE BASE COLOR...I do this because with shades and or highlights the best effects are small increments and building up this over layers,blending ,layering (whatever technique you have the most success and ease with)
This way as opposed to a darker and or lighter color of the base color (which many people do) it will be much more attractive to the eye during the viewing...ok so color interaction is a way to show contrast . Another way to show contrast is using hot/cold colors with your complimentery/analogous..What this means is we shade cool complimentary and highlight warm analogous..to highlight this take a bit of beige-screaming skull ushabit bone (these are Coolto the initial base color and their warm due to sharing a yellow hue (warm colors are oranges,yellow,reds - cool colors are blues purples greens even. Add this to the base color (always a Lil to the base color when shading or highlighting -small increments-yeah! Great work btw nice neat clean painting and very nice color choice and selection for the palette.
