What Is RandomA11y?

Updated

RandomA11y is a free web tool that generates accessible color combinations in real time. It is aimed at designers, developers, and anyone who needs a color pair that meets accessibility contrast requirements without manually checking ratios. The site describes itself as an "endless collection of accessible color combos" and a "real-time color playground."

What It Does

RandomA11y produces foreground/background color pairs that satisfy accessibility contrast standards. Each combination is generated on the spot, so you can keep refreshing to browse an effectively unlimited set of options.

The core value is simple: instead of picking two colors and then testing whether they pass, you start from pairs that already pass.

Who It Is For

  • UI and web designers looking for palette inspiration that won't fail a contrast audit.
  • Front-end developers who need quick, valid color pairs for components, text, or states.
  • Content creators who want readable text-on-background combinations for slides, posters, or graphics.
  • Anyone learning about accessibility who wants to see what compliant contrast looks like in practice.

How to Use It

  1. Open randoma11y.com in a browser.
  2. A color combination is displayed automatically.
  3. Generate a new combination to see another accessible pair.
  4. Note the colors you like and apply them in your design tool or code.

The exact controls and interface details are not documented in the available source material, so treat the above as the general workflow rather than a step-by-step menu guide.

Why Accessible Color Combos Matter

Accessibility guidelines such as WCAG specify minimum contrast ratios between text and background. Meeting them ensures that people with low vision or color vision deficiencies can still read content. Manually checking every pair is tedious; a generator that only outputs passing combinations removes that step.

Limitations to Keep in Mind

  • The tool focuses on contrast, which is one accessibility criterion among several. It does not guarantee that a palette is usable for colorblind users in every context or that it fits your brand.
  • Generated pairs are starting points, not finished design systems. You still need to test them in your actual layout, at your actual font sizes.
  • The available source material does not describe pricing, accounts, or export features, so no claims can be made about those.

Bottom Line

RandomA11y is a lightweight, no-friction way to discover color combinations that already meet accessibility contrast standards. Use it for inspiration and quick validation, then verify the final result in your own project.