In Opencart 2.0.3.1,
I've changed most of the colors for menu, links, add to cart button, etc. in the stylesheet.css, but I can't seem to alter the background blue color when the Add to Cart button loads something into the cart (and a few other "action" buttons, continue, login, etc.).
This may be because it's in the bootstrap.css, but I was wondering if anyone is familiar with how bootstrap would handle this "action" button background color, and help me locate the class to alter?
The "add to cart" button has a class "btn-primary". It is blue in color. You can remove it and give your custom class with any background color. Hope this helps :)