Colour contrast ratio

How to use colour contrast ratio

1. Enter your text or use the example already in the input box.
2. Set second colour.
3. Choose Run tool, then copy or download the output.

What to know

Calculate the WCAG sRGB contrast ratio between two solid colours. Does not assess font size or the rest of a page.

The tool treats the input as data and displays output as text. Review the result before using it in another document, application or production system.

Inputs are processed in your browser. See privacy information and methodology.

Example input

#204e3e