[Plugin: All-in-One Event Calendar] Add category color to background instead of event text on monthl

Hello,

In the screen shots for this plugin, there are some events that have white text and a colored background on them. And some that have the normal background with the text being the category background.

I don’t want the text to be the category color, how would I make my calendar look like the plugin screen shots?

Thank you in advance

http://wordpress.org/extend/plugins/all-in-one-event-calendar/