How to use this tool
Enter text and background colors to view a contrast ratio and practical guidance.
Before you begin
Only measures solid colors. Actual usability also depends on typeface, size and surrounding design.
Why keep files local?
The tool reads the input with your browser and processes it on your device. It does not send your file to a Workpico conversion API. If you share a result by copying or downloading it, you control what happens next.