Yes, that's something you can change in a custom action bar theme. On the Styles tab, choose "Upload Custom Theme File" and follow the link in the project settings to make a "Sherlock" conmpatible action bar theme with the style generator. IIRC the "Accent color" is the one you want to change.
Upload the resulting action bar theme .zip file and rebuild.
Comments
Upload the resulting action bar theme .zip file and rebuild.
Full details in this KB article: Android Action Bar Style Generator
Can you give me more an Android Action bar Style Generator" that compatible with andromo?