Khan/khan-exercises — pull request #24310 by saasmath (2012-06-19 20:53:15+00:00)
Title: Restore colors to .simple-button classes

Restored background colors to .simple-button classes lost with commit 263a5e43fa7fae86cf175dd8547adcbbb7f17ed2 which removed action-gradient classes which defined the background colors of several buttons in the development mode.

This adds the background color definitions to the khan-site.css file for those buttons.