woocommerce product gallery

Hi,
I am using the mystile theme and have woocommerce installed. I have uploaded my featured image and product gallery photos. When viewing product the products in the gallery have a gray over them until you hover the mouse over the product. Is there a way to get rid of the gray shadow over the pics so they are just clear like the featured image? I have looked at documentation on woocommerce and tried to get help there but they do not have support unless you buy something.