Like you said, I was trying to use colors from the whole spectrum. Purple, green and orange are equally spaced on the color wheel. The emphasis is on purple because it is the closest color to nothing.
Go ahead. I am looking forward to see how you do your florescent theme.
I would love doing freehand but my freehand sucks. In this instance though, I prefer the model to be more ethereal without the limits of flesh. Hence no veins and arteries.
I only prime with black. Even with lighter color models I'll still work with black. I normally do not use wash so black priming is better for the shadow regions.