#place_order.button.alt {
  background-color: #08cf3a;
}

.woocommerce button.button:hover {
  background-color: #20f211;
}

.checkout-button.button.alt.wc-forward {
  background-color: #08cf3a;
}

.checkout-button.button.alt.wc-forward:hover {
  background-color: #20f211;
}