Color Converter
Convert colors between HEX, RGB, HSL, and HSV.
- Browser-based
- No signup
Developer
Enter foreground and background hex colors to compute contrast ratio and AA/AAA results for normal and large text.
Sample heading
The quick brown fox jumps over the lazy dog.
17.74:1
Enter foreground and background hex colors to compute contrast ratio and AA/AAA results for normal and large text.
Use the Color Contrast Checker form near the top of this page. Enter the values you know, run the tool, and review the results panel. You can change inputs and run it again. Processing stays in your browser and is not uploaded to Utilnivo servers.
Example: open Color Contrast Checker, enter a realistic set of inputs for your situation, and note the primary result. Change one input—such as an amount, rate, or option—and compare how the output changes so you can choose a scenario that fits your needs.
Second example: try edge cases that matter for your task—such as zero values, a different unit system, or a second file—and confirm the tool shows a clear result or a helpful validation message.
Enter foreground and background HEX colors to calculate the WCAG contrast ratio and see AA/AAA pass or fail for normal and large text. Evaluation runs in your browser.
This tool runs in your browser for convenience. Results are estimates or transformations based on the inputs you provide and may not cover every edge case.
Contrast ratios follow WCAG relative luminance guidance for AA and AAA thresholds.