About HueCheck

HueCheck is a small, free tool for picking and converting colors, and checking whether a text/background pair meets WCAG accessibility contrast requirements. It was built to do one job well: give you an instant, accurate answer without asking for an account, a payment, or your data.

Everything happens in your browser — colors are converted between HEX, RGB, and HSL, and the contrast ratio is calculated using the official WCAG relative luminance formula, entirely client-side. Nothing you pick is ever sent to a server or stored anywhere.

HueCheck is supported by ads shown alongside the tool, which keeps it free to use with no limits. It's one of a growing set of small tools at Laborilo.