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Contrast Checker

WCAG contrast, AA and AAA, instantly.

WCAG contrast ratio between foreground and background colors.

  • Side panel
  • Right-click menu
Add to Chrome(opens the Chrome Web Store in a new tab)or pressCtrlShiftSpace
One Panel Search tools

Contrast Checker

Side panel

Contrast ratio

Ready01 / 03

01Features

What it does

  1. 01Contrast ratio
  2. 02AA / AAA badges
  3. 03Large text rules

02Use cases

When you'll reach for it

Validate button colours
Fix an accessibility audit finding

How to open it

  1. 1

    Side panel

    Click the One Panel icon in the toolbar and search for “Contrast Checker”.

Privacy

  • Runs entirely inside your browser. No account, no analytics, no remote code.

Keep going

Pairs well with

Design

Color Converter

Convert colors between HEX, RGB, HSL, HSV, HWB and CMYK.

Design

Color Picker

Pick a color from the screen or a swatch, copy as HEX/RGB/HSL.

Design

Palette Generator

Generate complementary, analogous, triadic, monochromatic and random palettes.

Design

Font Inspector

Hover any text on the page to see font family, size, weight, and line height.

Design

Responsive Viewer

Preview the active URL in multiple device viewports side by side.

Design

SVG Grabber

Extract inline SVGs from the page and copy as SVG or JSX.

Get Contrast Checker and 80 more

One install adds every tool to your side panel. No account, nothing to configure.

Add to Chrome(opens the Chrome Web Store in a new tab)