Change background button color of cart link only.

@jonelldj

Here is the CSS for cart button

a.button.xoo-wsc-cart.btn {
    background-color: #000;
    color: #fff;
}

Try this

a.xoo-wsc-ft-btn.xoo-wsc-chkt {
    background-color: #000!important;
    color: #fff!important;
}