Colour Contrast Grid Generator
Preview WCAG contrast ratios for every colour pairing.
- Reading time:
- 4 min
- Last updated:
- Price:
- Free, no signup
Type or paste text to see the result.
What the Colour Contrast Grid Generator does
Enter a list of colours and see a full grid of pairwise WCAG contrast ratios with AA/AAA pass indicators, so you can pick accessible foreground and background combinations at a glance. The Colour Contrast Grid Generator keeps every equivalent representation of a color in sync — HEX, RGB, HSL and named CSS values — so you can copy whichever format your target file expects.
The math is done with the standard sRGB gamma curve so the numbers match what design tools such as Figma, Sketch and Photoshop produce for the same swatch.
Why the Colour Contrast Grid Generator is useful
Everything runs locally, so brand palettes, unreleased product colors and client work stay on your device. There is no upload and no logging.
Pair the Colour Contrast Grid Generator with the HEX to RGB and RGB to HEX tools to move quickly between design and code, or with the CSS Beautifier to drop the finished values into a stylesheet.
Also known as: color contrast grid, wcag contrast checker, accessible color combinations, free colour contrast grid generator, online colour contrast grid generator, colour contrast grid generator online free, colour contrast grid generator tool.
How to use the Colour Contrast Grid Generator
- 1
Enter a color value
Paste a color — hex, rgb() or a named CSS color — into the Colour Contrast Grid Generator input.
- 2
Read the conversion
All equivalent representations update live: HEX, RGB, HSL and CSS variables.
- 3
Copy or download
Copy the value you need for your stylesheet, or download the full report as .txt.
Key features
- 100% free with no signup, watermarks or usage limits
- Runs entirely in your browser — your text never leaves the device
- Live results update on every keystroke
- One-click Copy, Download .txt and Clear buttons
- Works on mobile, tablet and desktop with dark and light mode
- Optimised for speed and Core Web Vitals — the page loads in under a second
Benefits
- Move colors between design tools and CSS without hunting for a converter
- Keep a consistent palette across mockups, code and documentation
- Preview values live before pasting them into a stylesheet
Real-life use cases
Design-to-code handoff
Designers work in HEX, stylesheets often want HSL or rgb(). Converting keeps the palette identical across both.
Building a consistent theme
Nudging lightness and saturation values gives you tints and shades that belong to the same family.
Accessibility work
Precise numeric values are the starting point for checking contrast and adjusting a palette until it passes.
Tips for the best results
- Keep hue steady and vary lightness to build tints and shades that match.
- Store colors as CSS variables so a theme change is a one-line edit.
- Always verify contrast for text colors before shipping them.
Conclusion
The Colour Contrast Grid Generator does one job properly: preview wcag contrast ratios for every colour pairing. It is free, needs no account, runs entirely in your browser and gives the same answer every time. Bookmark it, keep it open in a tab while you work, and pair it with the related tools below to build a fast workflow you never have to install.
Frequently asked questions
What does the Colour Contrast Grid Generator do?
- It computes the relative luminance of every colour you enter, then calculates the WCAG contrast ratio for every pair and marks whether each pairing passes AA (4.5:1) or AAA (7:1) for normal text.
What input format does it expect?
- A comma-separated list of hex colours, e.g. '#ffffff, #000000, #ff6b6b'.
Is my data uploaded anywhere?
- No. Everything runs locally in your browser using JavaScript, so your text never leaves your device and the tool keeps working offline once the page has loaded.
Is the Colour Contrast Grid Generator really free?
- Yes — every feature of the Colour Contrast Grid Generator is free with no signup, no watermarks and no daily limits. Text Tools Hub is funded by lightweight display ads.
Do you store the text I paste?
- No. The Colour Contrast Grid Generator runs entirely inside your browser. Nothing is uploaded, logged or stored on our servers.
Can I use it on my phone?
- Yes. The Colour Contrast Grid Generator is fully responsive with dark and light mode, so it works comfortably on any modern phone, tablet or laptop.
Does it work offline?
- Once the page has loaded, the tool keeps working even if your connection drops, because all processing happens in the browser.
Can I use the Colour Contrast Grid Generator for commercial writing?
- Absolutely. There are no licensing restrictions on the text you process — use the results in books, blogs, apps, contracts or client work.
Are there any usage limits?
- No hard limits — the Colour Contrast Grid Generator handles anything from a tweet to a full novel. Very large inputs may briefly slow older devices while your browser processes them.
Do I need to install anything to use the Colour Contrast Grid Generator?
- No. The Colour Contrast Grid Generator is a web page. Open it in any modern browser on any device and it is ready — there is nothing to download, install or update.
Related tools you may need
- Color Picker — Convert any CSS color into HEX, RGB and HSL representations.
- HEX to RGB — Convert HEX color codes to RGB with alpha support.
- RGB to HEX — Convert rgb() color values to HEX codes.
- HSL to RGB Converter — Convert HSL color values to RGB.
Keep exploring
Browse the full tools directory, filter by category, or read guides on the Text Tools Hub blog.