Some notes:Twilight is supposed to have asickly paleness to her because she often stays up (too) late, whereas Rarity carefully nurtures hers with sun-blockerRainbow Dash and Applejack both have a tan because they're often out in the field (either doing sports or tending to the farm).Same for the CMC (save Sweetie Belle, who is a little bit more sheltered)Spike has a slightly green-ish complexion because he's a dragonIf anybody else wants to take a stab at colouring, they can download the lines here