Sidewalk chalk theme
Backup current theme (programs/arduino-1.01/lib/theme)
Extract theme folder
Put extracted folder in the place of old theme folder
Based loosely on 'baycomb' theme for Vim
Buttons look cool when you mouse over them and click them
If you have non default color highlighting options you may want to change a few colors
I included a .psd file of the buttons in case you want to make some changes.