Product pages require a CTA
A prominent CTA is one of the most essential parts of a product page. Without a CTA, the UX dead ends when shoppers try to find the product they want to buy.
Regardless of your site’s color scheme, the CTA should color-contrast the background. It should be high in the page’s visual hierarchy.
Common product page CTA phrases include Buy Now, Add to Cart, and Order Now.
However, the copy is relative. Test different CTAs for yourself to learn what best complements your product.