To this end I've been trying to formulate a loose personal guide/system to base my own colour judgements around. As a means to finding a possible solution I decided to research Colour Psychology on the net. Certain colours are said to have certain common associations (Blue = melancholy, Green = Nature, envy etc etc). Although these associations are entirely subjective and often substantially vary according to nationality, there do seem to be some pretty consistently reccuring notions, which I think should definitely be capitalised on by the artist (as they offer a common reasonably accepted basis for making contextual colour = mood/emotion/theme judgements).
Here are a few Colour Psychology tables I found scattered about the internet which demonstrate various colour associations...
Link - http://webdesign.about.com/od/colorcharts/l/bl_colorculture.htm
