It turns out I've been giving bum advice FOREVER - I was about to tell Slouch off for telling you to desaturate your shadows, but he's right.
This is in MSPaint-o-vision, but it's a nice rule of thumb for colouring: http://www.johnlovett.com/shadows.htm
Your middle values / base colour should be the most saturated; lit areas will be slightly less saturated because light tends to wash colour out, and the shadows will be less saturated - but also tinted, with either the compliment for your lightsource or the compliment for your base colour.
Again, with most things I've ranted about: rule of thumb =!= DO THIS ALL THE TIME FOREVER. It's cool to break rules, provided you know them first
This is in MSPaint-o-vision, but it's a nice rule of thumb for colouring: http://www.johnlovett.com/shadows.htm
Your middle values / base colour should be the most saturated; lit areas will be slightly less saturated because light tends to wash colour out, and the shadows will be less saturated - but also tinted, with either the compliment for your lightsource or the compliment for your base colour.
Again, with most things I've ranted about: rule of thumb =!= DO THIS ALL THE TIME FOREVER. It's cool to break rules, provided you know them first