Free Color Tools Tools
9 free color tools — HEX/RGB/HSL converter, palette generator, WCAG contrast checker, colour blindness simulator, CSS gradient builder and more. All browser-based.
Whether you are a web designer converting hex codes to HSL for CSS variables, a brand manager checking WCAG contrast ratios for accessibility compliance, or a digital artist building a colour palette for a new project — LazyTools has a free colour tool for it. All 9 tools run entirely in your browser with no uploads, no account and instant results.
From the free HEX to RGB converter and CSS gradient builder to the WCAG contrast checker, colour blindness simulator and brand colour finder — these tools cover the full colour workflow for UI designers, front-end developers and accessibility auditors. Every tool is client-side: your colour data never leaves your browser.
Explore Colour Tools
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Free Online Color Tools: The Complete Designer's Guide
Colour is one of the most powerful design decisions you can make — and one of the most technically complex to get right across colour models, screen types and users with varying vision. LazyTools offers 9 free, browser-based colour tools covering conversion, palette generation, accessibility checking, CSS output and colour naming. All run client-side with no uploads and instant results.
Free HEX to RGB, HSL and CMYK Color Converter
The free Color Converter handles bidirectional conversion between HEX, RGB, HSL, HSV and CMYK — the five formats designers and developers encounter across CSS, print workflows, Figma, Adobe Illustrator and brand style guides. Enter any value and all four other representations update instantly. Essential for designers who receive a hex code from a brand guide and need to translate it into HSL for a CSS custom property, or need CMYK values for print production. The Color Name Finder and CSS Color Namer complement this: given any hex or RGB value, they return the closest named colour from a database of thousands — the 140 CSS named colours plus extended palettes.
Free Color Palette Generator for Designers
The free Color Palette Generator creates harmonious colour palettes from any base colour using classical colour theory harmony rules: complementary (maximum contrast), triadic (vibrant and balanced), analogous (calm and cohesive), split-complementary (lower contrast than direct complementary), and tetradic (richest, four equally-spaced hues). Each palette is displayed with hex and RGB values and can be copied as CSS custom properties. The Tint and Shade Generator produces 10 tints and 10 shades from any base colour — exportable as plain CSS, a Tailwind colour config object, or Sass variables for direct use in major front-end workflows.
The Brand Colour Finder provides official brand colour palettes for 500+ major companies — Google, Apple, Meta, Netflix, Spotify, Adobe, Airbnb and hundreds more — with exact hex, RGB and CMYK values from official brand guidelines. An essential reference for designers working on competitive analysis slides or presentations that need to accurately represent other companies' visual identities.
Free WCAG Contrast Checker for Accessibility
The free WCAG Contrast Checker calculates the contrast ratio between any foreground and background colour pair using the WCAG relative luminance formula. It instantly shows pass/fail status against WCAG 2.1 AA for normal text (4.5:1 minimum), WCAG 2.1 AA for large text and UI components (3:1), and WCAG 2.1 AAA enhanced text (7:1). Essential for front-end developers and UX designers ensuring colour combinations meet legal accessibility requirements under WCAG 2.1, the European EN 301 549 standard and the ADA. If a colour pair fails, the tool suggests alternative shades that would pass without requiring a completely different palette direction.
Free CSS Gradient Builder
The free CSS Gradient Builder creates linear, radial and conic CSS gradients through a visual interface. Add colour stops, set angles or positions, and copy ready-to-paste CSS output with -webkit- prefix fallbacks. Text gradients — where a CSS gradient is applied to text rather than a background — are handled automatically: the tool generates the background-clip: text and -webkit-text-fill-color: transparent syntax required, which is notoriously hard to recall and write correctly from memory.
Free Colour Blindness Simulator
Approximately 8% of men and 0.5% of women have some form of colour vision deficiency. The free Colour Blindness Simulator previews any uploaded image through eight simulation filters: Protanopia (red cone absent), Deuteranopia (green cone absent — the most common form), Tritanopia (blue cone absent), Protanomaly, Deuteranomaly, Tritanomaly, Achromatopsia (total colour blindness) and Achromatomaly. A side-by-side comparison view lets designers verify that colour choices communicate correctly to the full range of users — an essential step before publishing UI designs, data visualisations, maps and any content where colour conveys meaning.
Why Colour Accuracy Matters in Professional Design
The gap between "this colour looks right" and "this colour is correct across all use cases" is where most colour-related design problems originate. A brand colour specified in hex for digital use needs careful CMYK conversion for print to avoid hue shifts. A UI colour that looks high-contrast on a MacBook Pro P3 display may fall below WCAG thresholds on standard sRGB monitors. A red alert that communicates urgency to most users may be indistinguishable from a green success indicator for users with deuteranomaly. LazyTools' free colour tools address all of these scenarios without requiring expensive design software or paid subscriptions.