About our Website and Tools

About contrast checker tool

It is becoming more and more important to create digital products that are accessible and easy to use.

That's why WCAG is actively working on accessibility guidelines for web. One of the metrics is contrast ratio of background and foreground colors.

Color Contrast Checker is a simple tool with minimalistic UI to analyze and calculate contrast ratio of two colors.

About color relative luminance calculator tool

With Color Relative Luminance Calculator you can calculate the relative luminance of any color with one click!.


As you may already have noticed, contrastchecker.online website is a part of a bigger project - esse.tools

We have built contrastchecker.online and esse.tools to equip the digital workforce with essential online tools that are simple, fast, and beautiful.

You may check all the tools we have built, give them a try, and spread the word if you find them useful.