Woocommerce "cart updated" message color

Hello
I've been doing great with styling my pages and woo commerce. The item I'm having trouble with doesn't appear unless you update the cart. In which case a bar across the cart area appears and says "cart updated" i can change the color of that background except a small vertical rectangle at the beginning of the section which appears to be gray. I'd like to have the section be solid without the gray rectangle. Here's my cart page https://blackbutcher.com/cart . You'll have to add an item to the cart and update to this please.