Change Hover Color

I have searched and searched this forum and cannot figure out what I am doing wrong. I used a template which made some squares turn red when the mouse hovers over them - this red is not one of our "colors" and I need it changed. BUT, I cannot figure out how to change it. As far as I can tell, there is NOT a trigger, unless there's a trigger that doesn't show up in the triggers list? I am assuming it's changing due to a trigger, but I can't find the trigger! Can someone help? Thanks! 

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