[Grace Themes]

Add below css code in Appearance -> Editor -> style.css file

.woocommerce table.shop_table th, .woocommerce-page table.shop_table th {  color:#6E6D6D }

.woocommerce #respond input#submit.alt, .woocommerce a.button.alt, .woocommerce button.button.alt, .woocommerce input.button.alt {
    background-color: #5bd3a7 !important;
}

Regards
Grace Themes