---
title: "Random colour and palette generator — free, runs in your browser"
description: "Generate random colours or a harmonious palette, with contrast checked. Free, no sign-up, and nothing you enter leaves your browser."
url: https://atoneplace.net/tools/random-color-generator/
site: "At One Place"
---

# Random colour and palette generator

Generate random colours or a harmonious palette, with contrast checked.

## How it works

Generates random colours, or a palette built on a colour-wheel relationship: complementary, analogous, triadic, split-complementary or monochromatic.

Palettes are generated in HSL rather than by picking random RGB values, because RGB randomness produces muddy, unrelated colours. Working from a hue angle and holding saturation and lightness in a sensible band is what makes a set look deliberate.

Each colour reports its contrast against black and white per WCAG 2.1, which is the number that decides whether text on it is legible. A palette that looks good and fails contrast is a palette you will have to redo once accessibility is checked, so it is checked here first.

Colour-wheel harmony is a convention from art teaching rather than a law of perception. It is a useful starting point, not a rule.

> This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected.

## Common questions

### What is a complementary colour?

The hue directly opposite on the colour wheel, 180° away. It gives the strongest contrast between two hues.

### Why generate palettes in HSL rather than RGB?

Random RGB values produce unrelated, muddy colours. HSL lets you vary hue while holding saturation and lightness, which is what makes a set look intentional.

## Related pages

- [Colour converter](https://atoneplace.net/tools/color-converter/)
- [Colour shades and gradient generator](https://atoneplace.net/tools/color-shades-generator/)
- [Extract colours from an image](https://atoneplace.net/tools/image-color-extractor/)
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## Sources

- Calculated on this page — At One Place (/about/)