How to make the cart module background color invisible on cart empty?

Hello,
I have customized my cart to have a background color, and I want it to be completely hidden when it's empty.
The cart is being hidden, but I still see some of the background color.

I understand that this happens because even when hidden the cart module is still loading some divs, which have the background color applied to them as well as some padding.
My problem is that by inspecting the code I cannot find any div that is being showed only when the cart is full and that also contains the full cart, so that I can apply to that one the color.

.hikashop_cart_module_blue .hikashop_cart_module {background: #279fba;
    color:#fff;
    padding: 10px
  }

Thank you,
I didnt' realize the module tmpl file was there too

Here is the customization in case someone else need it

.hikashop_cart_custom {background: #279fba;
    color:#fff;
    padding: 10px
  }