Can't change color of Woocommerce buttons

I’ve created a child theme for my site https://muffinink.com/

I’ve successfully changed the colour of the search button to red, but I can’t seem to change the colour of the Woocommerce buttons, which remain stubbornly blue. (It works when I change the colour using the developer tool in Chrome, but when I add the code to the CSS nothing happens on the site.)

The code I’m using is:

.woocommerce #review_form #submit, .woocommerce a.button, .woocommerce a.button.add_to_cart_button, .woocommerce button.button, .woocommerce input.button {
    background: #ba272d!important;
}

Any idea why this isn’t working?