# Free color contrast checker: AyeTab and three alternatives

> AyeTab, WebAIM, Chrome DevTools and WAVE, and which one fits a single color pair, a shareable result or a full page.

URL: https://claudegpt.si/news/free-color-contrast-checker-tools  
Published: 2026-10-27T15:16:11.829Z  
Author: ClaudeGPT Si Newsroom  
Section: AI Tools  
Topics: Color contrast, Accessibility, Developer tools  
Publisher: ClaudeGPT Si

## Key takeaways

- The AyeTab Contrast Checker is the top free pick for testing a color pair, with separate grades for normal text, large text and UI components.
- WebAIM's checker adds permalinks and a JSON API, and Chrome DevTools finds low contrast on the page you are building.
- WAVE reviews a whole page, which suits finding problems; a pair checker suits settling the fix.

The best free color contrast checker for most people is the [AyeTab Contrast Checker](https://app.ayetab.com/tools/contrast-checker): paste two colors, and it shows the ratio with separate WCAG grades for normal text, large text and UI components, all inside your browser. WebAIM's checker and Chrome DevTools are solid alternatives, and WAVE is the pick when you need a whole page checked rather than one pair.

## The short list

| Tool | Best for | Where it runs |
| --- | --- | --- |
| AyeTab Contrast Checker | Testing and fixing a color pair privately | Web app and Chrome new tab |
| WebAIM Contrast Checker | Shareable results and a simple API | Web page |
| Chrome DevTools | Finding low contrast on the page you are building | Built into Chrome |
| WAVE | Reviewing every element on a page | Web tool and browser extensions |

## 1. AyeTab Contrast Checker

AyeTab is a free set of developer tools, and its contrast checker is the most direct of the four. You get a Foreground and a Background card, each with a hex field, a color picker swatch and a sample sentence drawn in the current pair. A Swap button flips them. Below sits the ratio, three grades (normal text, large text, UI components) and one line that says which levels the pair meets.

What sets it apart is where it runs. The check happens locally: nothing is uploaded, no account is needed, and the page keeps working offline once loaded. If you install the [AyeTab extension for Chrome](https://ayetab.com), the same checker sits on your new tab page and in a side panel, one Ctrl+K or Cmd+K away. Next to it are a Colour Blindness Simulator, a Palette Generator and a HEX, RGB and HSL converter, so a palette can go from idea to tested in one place.

**Pick it if** you check colors often and want the tool close at hand and private.

## 2. WebAIM Contrast Checker

WebAIM's checker is a single plain page from the accessibility group at Utah State University. You enter hex values or use a color picker, and it reports AA and AAA results for normal text, large text, and graphical objects and UI components. It adds an alpha value for the foreground and a lightness slider for each color. Each result has a permalink, appending `&api` to that link returns JSON, and there is a bookmarklet for checking colors on any page.

**Pick it if** you want to paste a link to the result into a ticket, or call the check from a script.

## 3. Chrome DevTools

Chrome's built-in tools find low contrast for you. The CSS Overview panel lists contrast issues on the page, a Lighthouse accessibility report has a contrast section, and the Color Picker in the Elements panel suggests colors that would fix a failing ratio. DevTools can also emulate vision deficiencies.

**Pick it if** you are already inspecting the page and want to fix issues in place.

## 4. WAVE

WAVE is WebAIM's suite of evaluation tools. You can enter a page address on its site, or use its Chrome, Firefox or Edge extension to test pages that sit behind a login or run locally. WebAIM notes that WAVE checks contrast for all text on a page at once.

**Pick it if** you need an overview of a full page, contrast included, not a single pair.

## What any checker should tell you

Whichever you use, it should grade against the WCAG 2.2 thresholds: 4.5:1 for normal text and 3:1 for large text at level AA, 7:1 and 4.5:1 at AAA, and 3:1 for UI components. Large text means 18 point, or 14 point bold.

## Our pick

Use a page auditor (DevTools or WAVE) to find the problems, then settle each fix in AyeTab, where you can try colors until the grade passes and your colors never leave the machine. If you need shareable links or an API, WebAIM's checker is the better fit for that job.

## Frequently asked questions

### What is the best free color contrast checker?

For checking and fixing color pairs, the AyeTab Contrast Checker: it is free, needs no account, runs locally and is also on the AyeTab new tab in Chrome.

### Can a contrast checker scan a whole website?

A pair checker cannot. Use a page tool such as Chrome DevTools' CSS Overview, a Lighthouse report or WAVE to list problems across a page.

## Sources

- [Contrast Checker Online: WCAG AA & AAA](https://app.ayetab.com/tools/contrast-checker), AyeTab
- [AyeTab](https://ayetab.com), AyeTab
- [Contrast Checker](https://webaim.org/resources/contrastchecker/), WebAIM
- [Make your website more readable](https://developer.chrome.com/docs/devtools/accessibility/contrast), Chrome for Developers
- [WAVE Web Accessibility Evaluation Tools](https://wave.webaim.org/), WebAIM
- [Understanding SC 1.4.3: Contrast (Minimum)](https://www.w3.org/WAI/WCAG22/Understanding/contrast-minimum.html), W3C