Contrast checker

Estimate WCAG contrast between two colors.

Result

Logic

Contrast checker

Farben werden in RGB normalisiert; Kontrast nutzt relative Luminanz.

Example

Input

#2563eb and #ffffff

Result

Contrast about 5:1

Common mistakes

Copying results without context
Ignoring rounding
Using output without a plausibility check

Runs locally in the browser

Inputs stay in your browser. Toolwise does not store calculations.

Check

When is the result reliable?

How does Contrast checker calculate?

Contrast checker uses this visible logic: Farben werden in RGB normalisiert; Kontrast nutzt relative Luminanz. Example values and common mistakes are shown next to the tool.

Do inputs stay local?

Yes. The calculation runs in the browser. Toolwise does not send inputs to a server or load external calculation modules.

What should I do next?

Copy the result or pass it locally to Hex to RGB if you want to continue the workflow.