I thought non-complete filling of event bubble is my local bug.

http://s0.uploads.im/CMsY7.png

But on demo site is the same color stripe. Most of the filling is the same dreadful yellowish from standard Calendar module.

http://s0.uploads.im/kb1ra.png

http://openoutreach.org/event/month/2013-03

Would you add an option to complete fill the event bubble with color?