5 Free Online Design Tools
Color Palettes, WCAG Contrast & Gradients
Build color palettes, check WCAG contrast ratios, generate CSS gradients, and find color harmonies. Free design tools for UI and UX designers that work right in your browser.
Design Tools
Color Harmonies Generator
Generate complementary, triadic, analogous, and split-complementary color harmonies. Based on color theory for perfect color relationships.
Color Palette Generator
Generate beautiful color palettes instantly. Complementary, analogous, triadic, and monochromatic schemes. Export as CSS, Sass, or design files.
CSS Gradient Generator
Generate CSS linear and radial gradients visually. Add unlimited color stops, adjust angle, choose from presets, and copy clean CSS code instantly. Free CSS gradient generator.
Palette Contrast Checker
Check color contrast for every combination in your palette at once. Generate a full WCAG contrast matrix - both AA and AAA results side by side. No dropdowns, no switching.
WCAG Contrast Checker
Check color contrast ratios for accessibility compliance. Ensure WCAG AA and AAA standards. Make designs readable for everyone.
5 Free Design Tools for Color, Contrast and Accessibility
All 5 design tools run in your browser with no plugins or installs required. They are built for UI designers and frontend developers who need fast, accurate color decisions -- whether starting a new brand, refining a component library, or auditing an existing design for accessibility compliance.
The Color Palette Generator builds a full set of coordinated color shades from a single base color. Adjust hue, saturation, and lightness to get a palette that works across backgrounds, text, borders, and interactive states. The Color Harmonies Generator suggests complementary, triadic, split-complementary, and analogous combinations so you are never stuck guessing what pairs well with your brand color.
The WCAG Contrast Checker and Palette Contrast Checker help you meet accessibility standards before your design reaches a developer. Enter any foreground and background color to instantly see the contrast ratio and whether it passes WCAG AA or AAA for normal text, large text, and UI components. Catching contrast issues at the design stage is far cheaper than fixing them in production.
The CSS Gradient Generator lets you build linear and radial gradients visually with multiple color stops and angle controls. Copy the output directly as production-ready CSS. All five tools update in real time as you adjust values, so you can iterate quickly and copy exactly what you need without writing any code.
All tools run entirely in your browser. No files are uploaded to our server.
Explore Other Categories
Discover more tools for different needs
Image Tools
Compress, convert, and optimize images for blazing-fast websites. All processing happens securely in your browser.
Code Tools
Format, minify, and validate your code. Perfect for developers working with JSON, HTML, CSS, and JavaScript.
SEO Tools
Optimize meta tags, preview search results, generate QR codes, and boost your search rankings.
Converters
Convert between formats instantly. JSON to CSV, timestamps, color codes, units, and Base64 encoding.
HTML & CSS Generators
Generate CSS code visually. Gradients, box shadows, flexbox, grid layouts with live preview and copy-ready code.
Text Tools
Manipulate text easily. Case converter, word counter, slug generator, and lorem ipsum placeholder text.
Security Tools
Generate secure passwords, create cryptographic hashes, produce unique UUIDs, and decode JWT tokens.
Web Utilities
Essential web tools for developers. IP lookup, user agent parser, HTTP status codes reference, and query string builder.
PDF Tools
Merge, split, compress, convert, and edit PDF files - all inside your browser. No uploads, no installs, 100% free.
Frequently Asked Questions
Everything you need to know
We offer a Color Palette Generator, Color Harmonies Generator, CSS Gradient Generator, WCAG Contrast Checker, and Palette Contrast Checker -- all aimed at helping designers and developers create beautiful, accessible UIs.
Use our Contrast Checker tool. Enter your foreground and background colors, and it instantly shows the contrast ratio and whether it passes WCAG AA and AAA standards for normal and large text.
Yes. Color palettes can be copied as HEX, RGB, or HSL values. Many tools also let you copy the full palette as a CSS variable block ready to paste into your stylesheet.
Absolutely. Frontend developers use our design tools daily to pick accessible color combinations, generate gradient CSS, find harmonious color pairings, and ensure visual consistency across components.
Yes. All design tools are fully responsive and work on tablets and mobile devices. Perfect for quick color checks or palette exploration while away from your desk.
Start with the Color Palette Generator to build a set of shades from your base brand color. Then run each color combination you plan to use for text and background through the WCAG Contrast Checker or Palette Contrast Checker. Aim for a minimum ratio of 4.5:1 for body text (WCAG AA) or 7:1 for maximum accessibility (WCAG AAA). Fix any pairs that fail before handing the palette to your development team.
WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text (under 18pt) and 3:1 for large text (18pt or 14pt bold). WCAG AAA requires 7:1 for normal text and 4.5:1 for large text. AA is the standard legal minimum in most countries. AAA is recommended for text-heavy content, government sites, and applications used by people with low vision.
The WCAG Contrast Checker tests one foreground-background pair at a time. The Palette Contrast Checker lets you add your entire color palette and generates a full contrast matrix -- every possible pair in one view. Each cell shows AA and AAA pass/fail plus a live 'Aa' preview in those exact colors. Export the full matrix as CSV for accessibility audits and design handoffs.
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