App Icon Concept

I'm working on redesigning a photo app and thought I should start by finding a great color palette and throwing around a few ideas for an icon. First of all, the colors were taken from Peter Blatchford's Palette here on Dribbble. The font for the "S" is Eurostyle, but modified a bit to make it more rounded.

I'd love to hear people's suggestions on improving the design... really anything! Be sure to check out the full resolution attachment.

Oh, and the wood background can be found on Subtle Patterns.