[Plugin: WooCommerce -excelling eCommerce] variable backgrounds

Hello, my site is http://www.thepaisleybox.com.

I have added size/color variables to two of my products (http://thepaisleybox.com/product/honeymoon-bag/ & http://thepaisleybox.com/product/bridesmaid-box/ ). The attributes have a white background, which does not match my template.

Can someone help me figure out how to make the background of the attributes transparent so it matches my grey template?

Thank You