Add this to your CSS, of course change every occurrence of red in the script, hex and wording….
.woocommerce #content input.button.alt:hover, .woocommerce #respond input#submit.alt:hover, .woocommerce a.button.alt:hover, .woocommerce button.button.alt:hover, .woocommerce input.button.alt:hover, .woocommerce-page #content input.button.alt:hover, .woocommerce-page #respond input#submit.alt:hover, .woocommerce-page a.button.alt:hover, .woocommerce-page button.button.alt:hover, .woocommerce-page input.button.alt:hover {
background:red !important;
background-color:red !important;
color:white !important;
text-shadow: transparent !important;
box-shadow: none;
border-color:#ca0606 !important;
}
.woocommerce #content input.button:hover, .woocommerce #respond input#submit:hover, .woocommerce a.button:hover, .woocommerce button.button:hover, .woocommerce input.button:hover, .woocommerce-page #content input.button:hover, .woocommerce-page #respond input#submit:hover, .woocommerce-page a.button:hover, .woocommerce-page button.button:hover, .woocommerce-page input.button:hover {
background:red !important;
background-color:red !important;
color:white !important;
text-shadow: transparent !important;
box-shadow: none;
border-color:#ca0606 !important;
}
.woocommerce #content input.button, .woocommerce #respond input#submit, .woocommerce a.button, .woocommerce button.button, .woocommerce input.button, .woocommerce-page #content input.button, .woocommerce-page #respond input#submit, .woocommerce-page a.button, .woocommerce-page button.button, .woocommerce-page input.button {
background: red !important;
color:white !important;
text-shadow: transparent !important;
border-color:#ca0606 !important;
}
.woocommerce #content input.button.alt:hover, .woocommerce #respond input#submit.alt:hover, .woocommerce a.button.alt:hover, .woocommerce button.button.alt:hover, .woocommerce input.button.alt:hover, .woocommerce-page #content input.button.alt:hover, .woocommerce-page #respond input#submit.alt:hover, .woocommerce-page a.button.alt:hover, .woocommerce-page button.button.alt:hover, .woocommerce-page input.button.alt:hover {
background: red !important;
box-shadow: none;
text-shadow: transparent !important;
color:white !important;
border-color:#ca0606 !important;
}
