03-15-2011, 06:37 PM
It's a thing called readability. Look it up in the sprite dictionary thread. It's nothing to do with colours (although 5 is too many for Oracle-style sprites), but more to do with the structure of the sprite. You can't make a sprite this size and fit in every last detail. Instead, you want to get the general essence of the character and attempt to show what you do put in clearly.