OmniKit
Free Web Tools•100% Client-Side
Color & GradientUpdated: 2026-08-26

WCAG Color Contrast Checker

Direct Answer:Colour Contrast Checker is a 100% free, client-side online tool that runs entirely in your browser memory for maximum speed and data privacy.

Color Contrast Ratio:
17.85 : 1
PASS

Headline Preview (18pt+)

Live sample text demonstrating readability and visual contrast against selected background.

WCAG AA
Normal (≥ 4.5:1)
WCAG AA
Large (≥ 3.0:1)
WCAG AAA
Normal (≥ 7.0:1)
WCAG AAA
Large (≥ 4.5:1)

How to Use WCAG Color Contrast Checker

1

Pick or Enter Color

Choose colors using the picker or input HEX, RGB, HSL values.

2

Adjust Harmonies

Generate complementary, analogous, or gradient color schemes.

3

Copy CSS Code

One-click copy of clean CSS declarations and hex codes.

Understanding Results

Contrast Ratio
Luminance contrast ratio evaluated against WCAG AA/AAA accessibility standards.
Color Space
Mathematical model (HEX, RGB, HSL, CMYK) defining color coordinates.

Key Features

Real-time color conversions across HEX, RGB, HSL, and HSV
WCAG 2.1 AA/AAA compliance contrast ratio validator
CSS linear and radial gradient builder with code output
Export palettes to CSS variables and JSON presets

Frequently Asked Questions (FAQ)

Answers and mechanics behind WCAG Color Contrast Checker

A:
WCAG 2.1 AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text.

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