No doubt, ceramic tiles make bathroom good looking but they become yellowish (if use white) just after few months or 1-2 years. Apart from tiles, the color of bathtub and sinks also get converted into yellow as they are also made up of ceramic. It is not possible to change them again and again because its time consuming and expensive but you can use Rustoleum tub and tile paint to make your bathroom ceramic tiles, sinks, and tubs new again. You can buy it directly from https://www.truworthhomes.com/specialty-tub-tile-expoxy-paint-refreshing-kit.html! Click here to see video.