Hello,
Add the next code in Theme options > Theme Custom CSS:
.content-product .price, .content-product .products-page-brands, .content-product .products-page-brands a, .content-product .products-page-cats, .content-product .products-page-cats a,
.et_product-block > .price, .et_product-block .et_connect-block > .price, .et_product-block form.cart .price, .et_product-block .group_table .woocommerce-Price-amount {
color: #222;
}
Regards