ACCESSIBILITY TOOL

Check text color contrast against WCAG thresholds.

Compare foreground and background hex colors, preview the combination and see pass or fail results for normal and large text.

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LOCAL BROWSER TOOL

Run the tool

Enter two hex colors. The text area is optional; run the tool to calculate the contrast ratio.

Optional notes

Second input

Contrast result

HOW IT WORKS

Contrast is a measurable part of readable interface design.

The calculation converts sRGB colors to relative luminance and applies the WCAG contrast formula. AA normal text requires 4.5:1, while AAA normal text requires 7:1.

Your data stays local

The transformation runs in this browser tab. ClearText Tools does not upload the input to a processing server.

Review the output

Copy the result only after checking structure, edge cases and any values that affect production systems.

Known boundaries

Passing contrast does not guarantee overall accessibility
Large text has specific size and weight definitions
Check interactive states separately

NEXT TASK

Continue this workflow

Use a related tool or guide when the result needs another cleanup, validation or conversion step.

SERP preview Image resizer Developer tools WCAG contrast guide

Common questions

Is my input uploaded?

No. This tool processes the input locally in your browser.

Can I use the result without checking it?

Use it as a fast transformation, then validate important output against the requirements of the destination system.