What color harmony rules are supported?

Complementary (opposite hues), Analogous (adjacent hues), Triadic (equilateral triangle on color wheel), Tetradic (rectangle), and Monochromatic (varied lightness and saturation).

How does image color extraction work?

When you upload an image, an offscreen canvas samples pixel RGB values across the image and groups them into dominant color clusters. Your image is never uploaded to any server.

What are the WCAG 2.1 contrast requirements?

WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. WCAG AAA requires 7:1 for normal text and 4.5:1 for large text.

Color Palette Generator & Contrast Checker

Colors & Palettes

Generate harmonious color palettes, extract dominant colors from photos, and check WCAG 2.1 contrast ratios.

Color Palette Generator & Contrast Checker

Generate harmonious color palettes, extract dominant colors from photos, and check WCAG 2.1 contrast ratios.

3/3 Free Daily Uses

✓ WCAG AA Black

or press Spacebar

Tool Overview & Guide

What is Color Palette Generator & Contrast Checker?

Generate harmonious color schemes, extract dominant palettes from uploaded photos, and verify WCAG 2.1 accessibility contrast ratios in real-time. 100% client-side and free.

Technical Specifications & Supported Formats

Processing Engine:HTML5 Canvas & Squoosh Client Engine

Privacy & Security:100% In-Browser (Zero File Upload)

Supported Formats:PNG, JPG/JPEG, WebP, SVG, AVIF, GIF, ICO

Max File Limit:100 MB

How to use Color Palette Generator & Contrast Checker

3 simple steps to complete your task directly in your browser:

Generate or Extract
Press Spacebar to randomize color palettes, pick a harmony rule (Analogous, Complementary, Triadic), or upload an image to extract its photo palette.
Lock & Fine-Tune
Lock colors you love while regenerating the others, or click any swatch to tweak its exact HEX, RGB, or HSL value.
Check WCAG Accessibility
Inspect real-time contrast ratios and WCAG AA / AAA readability compliance for text and UI elements.

Common uses

Web & UI Designers: Build balanced color systems for websites, mobile apps, and design tokens.
Developers: Quickly get accessible color pairings that pass WCAG compliance tests.
Brand Marketers: Extract cohesive brand color schemes from photography and logos.
Illustrators & Digital Artists: Generate fresh mood boards and color harmonies.

Why choose VersaTools

100% private

Your files are processed inside your browser and are never uploaded to a server.

Free, no account

No sign-up, no watermark, no paywalled “premium” tier. Just open a tool and use it.

Instant

No upload, no queue, no server round-trip — work starts the moment you drop a file.

Runs in your browser

Built on open web standards. Works on any modern desktop browser, nothing to install.

No upload size caps

Nothing leaves your device, so there’s no server file-size limit — only your machine’s memory.

Yours to keep

Results download straight to your device in clean, standard file formats.

Frequently asked questions

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