Change button colors through CSS

Hello,

I’m trying to change the “proceed to checkout” button colour from the default purple to something else (more reddish).

I can’t use the colour picker in WC’s settings since the files aren’t writable from the webserver.

I’ve added the following css to my theme’s style:

.woocommerce a.button.alt, .woocommerce-page a.button.alt, .woocommerce button.button.alt, .woocommerce-page button.button.alt, .woocommerce input.button.alt, .woocommerce-page input.button.alt, .woocommerce #respond input#submit.alt, .woocommerce-page #respond input#submit.alt, .woocommerce #content input.button.alt, .woocommerce-page #content input.button.alt {
  background: -moz-linear-gradient(center top , #d25151 0px, #96588A 100%) repeat scroll 0 0 rgba(0, 0, 0, 0);
  border-color: #76456C;
  color: #FFFFFF;
  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.6) !important;
}

yet nothing seems to change. I’m getting a bit lost in WC’s CSS though.

https://wordpress.org/plugins/woocommerce/