Hi
Add this to Theme Options > Custom CSS:
.woocommerce a.button.alt.disabled, .woocommerce button.button.alt.disabled, .woocommerce input.button.alt.disabled, .woocommerce #respond input#submit.alt.disabled, .woocommerce a.button.alt:disabled, .woocommerce button.button.alt:disabled, .woocommerce input.button.alt:disabled, .woocommerce #respond input#submit.alt:disabled, .woocommerce a.button.alt[disabled]:disabled, .woocommerce button.button.alt[disabled]:disabled, .woocommerce input.button.alt[disabled]:disabled, .woocommerce #respond input#submit.alt[disabled]:disabled, .woocommerce a.button.alt.disabled:hover, .woocommerce button.button.alt.disabled:hover, .woocommerce input.button.alt.disabled:hover, .woocommerce #respond input#submit.alt.disabled:hover, .woocommerce a.button.alt:disabled:hover, .woocommerce button.button.alt:disabled:hover, .woocommerce input.button.alt:disabled:hover, .woocommerce #respond input#submit.alt:disabled:hover, .woocommerce a.button.alt[disabled]:disabled:hover, .woocommerce button.button.alt[disabled]:disabled:hover, .woocommerce input.button.alt[disabled]:disabled:hover, .woocommerce #respond input#submit.alt[disabled]:disabled:hover {
color: #111111!important;
}
– Kyle