Hello,

This is possible to change with the custom CSS:

/*description text*/
.woocommerce-product-details__short-description p{
    font-size: 22px;
    color:red;
}

/*title*/
.product-image-summary .entry-title{
    font-size: 22px;
    color:red;
}

/*price*/
body .product-image-summary .price span {
    font-size: 22px;
    color:red;
}

Change 22px and “red” as per your needs and add the code to the Theme settings > Custom CSS.

Best Regards