Color Tools for Designers & Developers

A focused toolkit for building accessible, on-brand color systems—from generating palettes to checking WCAG contrast for real-world interfaces.

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Palette Generator

Generate harmonious color palettes based on color theory. Create perfect combinations for your projects.

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Accessibility Contrast Checker

Check color contrast ratios for accessibility compliance. Ensure your designs meet WCAG guidelines.

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Color Mixing Simulator

Mix two colors using real paint-style RYB logic. See mixed hex, RGB values, and closest color names instantly.

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Professional color tools for modern design workflows

The Theme & Color tools are built for product designers, front-end developers, and brand teams who need reliable, repeatable color decisions—not guesswork. Instead of juggling screenshots and spreadsheets, you can generate palettes, document decisions, and check accessibility in one place.

Color palette generator

Use the color palette generator to build harmonious palettes for websites, design systems, or brand identities. Start from a single base color and explore complementary, analogous, or triadic schemes with hex values ready to paste into Figma, CSS, or your component library.

Accessibility contrast checker

The accessibility contrast checker helps you validate text and background pairs against WCAG contrast ratios. Quickly see which combinations pass AA or AAA, then adjust your palette before development so your interface ships accessible by default.

Color mixing simulator

Try the color mixing simulator to see what colors make when mixed like paint, not digital light. It uses an RYB color model so combinations like blue + yellow resolve to realistic green-style mixes.

Together, these free online color tools give you a practical way to design, test, and maintain a professional color system across marketing sites, apps, and design systems—without sacrificing performance, legibility, or brand consistency.

Related guides

Deep dives that pair with these tools: Forest green hex code, Forest green palette, Ocean Breeze hex codes, Ocean Breeze palette, WCAG contrast guide, Dark mode palettes, Best palette tools. See the full list on the color blog.

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