I agree adding some black would give it some dimension, if you are going for a more whimsical look you could stripe the body with 2 different colors and pipe the edges with one of those colors, adding the antenna's will make it look different too.

I am also working on butterflies, they are giving me fits too, It was a last minute thought to add them to the cake I am making for my niece, so instead of fondant, I thought about just making some from laffy taffy and some other candies, i have no idea if it's going to work or not. I also have a back-up plan too, I did make some from royal icing, so if they dry in time I may end up using those.
Happy cakin' tonight!!

Dang, all this time, I have been putting moths on my cakes, learn something new everyday, thanks! lol

Every butterfly I that I get instructions for, to make have antennae, I ordered edible butterflies from Jen Dontz and she sent me antennae's with them and she also sent the instructions, I also bought the gelatin butterfly book and those butterflies, have antennae.

Edited to add: butterflies does have antennae.
http://en.wikipedia.org/wiki/File:Butterfly_parts.svg