If you install the WooCommerce plugin for WordPress, you may notice some colors do not match your WordPress theme. You can add a CSS over-ride to change the default color here.


Add this CSS code to make the blue background black. 

woocommerce .woocommerce-error, .woocommerce .woocommerce-info, .woocommerce .woocommerce-message {
    background: #000!important;
}