[For 1.8] Thank You/Like System v3.4.1 + MyAlerts and Tapatalk support

[DurtySonuva]

I'm sure this is probably an easy fix, but how to I get the like box to be the same color as my theme? I went into the .css inside my theme templates and altered the background to the color I wanted, but it still shows up as an off white. I'm at a loss.