Contrast Optimizer

Automatically adjust a text color's lightness until it passes WCAG AA, AAA or large-text contrast — hue preserved. Free, instant, and private — everything runs in your browser.

Shortcuts: / search · R randomize · T theme

How to use the contrast optimizer

  1. Adjust the controls — every change updates the live preview instantly.
  2. Fine-tune until the result matches what you need.
  3. Copy the output with one click, or use the download/export buttons where available.

Frequently asked questions

What does the contrast optimizer do?

Automatically adjust a text color's lightness until it passes WCAG AA, AAA or large-text contrast — hue preserved.

Is the contrast optimizer free to use?

Yes — every Yexla tool is completely free with no signup, no limits and no watermarks. Everything you generate is yours for personal and commercial use.

Is my data uploaded anywhere?

No. All processing happens locally in your browser using standard web APIs — your text, colors, code and images never leave your device.