I coloured this at a friend's house while getting drunk with some pals, can you tell? :)  

"Hey, how about red here and purple there?"  
"Wait, no, no, I got it!  Colour his sac purple too!"

I was also kinda blasted from the fumes coming from the markers at the time, too :]

Anyhow, I put him in a desert at his colours reminded me of the schemes used in Africa and thereabouts.  I think he came out alright :)