Color Palette Generator

What is a Color Palette Generator?

A color palette generator builds a set of colors that work well together, based on a starting hue and a harmony rule rather than trial and error. Pick a base hue, choose how many colors you need, and select a harmony mode — analogous, complementary, triadic, or monochromatic — and the tool computes a full palette using standard color theory instead of guessing at values that might clash.

Every swatch shows its exact HEX value and can be locked in place, so a color that already looks right stays put while the rest of the palette keeps regenerating around it. Once the set is right, export it as a HEX list, a block of CSS custom properties, or a JSON file ready to drop into a design system or codebase.

How to use it

How the harmony modes work

Each mode places colors around the hue wheel using a different rule. Analogous colors sit close together — roughly 30 degrees apart — which produces a palette that feels cohesive because every color shares a family resemblance. Complementary pairs colors from opposite sides of the wheel, 180 degrees apart, for strong contrast between two families. Triadic spaces three hues 120 degrees apart for a balanced, vivid set, and monochromatic keeps the hue fixed while stepping the lightness from dark to light, the safest option when a palette needs to read as a single color at different intensities rather than several distinct ones. Random ignores the harmony rule entirely and draws an independent hue, saturation, and lightness for every swatch.

Features & benefits

Why people build color palettes

Designers and developers reach for a palette generator at the start of a project, before a single component is styled, because picking colors one at a time rarely produces a set that holds together. A UI needs more than one good color — it needs a primary, a few supporting tones, and often a muted or dark variant of each — and working those out by eye takes far longer than generating a harmonious base and adjusting from there. The same tool is useful for brand exploration, data visualization charts that need distinct but related series colors, or simply for picking an accent that complements a color that's already fixed, like a logo.

Locking is what makes this practical for real work rather than a novelty. A palette rarely needs to change all at once — usually one or two colors are already right, and the rest need to catch up. Locking those first choices and regenerating around them turns the tool into an iterative design aid instead of a one-shot random generator.

Why this runs entirely in your browser

Every hue, lock state, and export happens locally in JavaScript — nothing about the palette being built is sent to a server. That keeps the tool fast, since there's no round trip for every slider movement, and means a work-in-progress brand palette never leaves the device it's built on. It also keeps working without a network connection once the page has loaded, and nothing persists after the tab is closed.

Getting a palette that actually works

Analogous and monochromatic modes are the safest starting points for a UI, since their colors are naturally close enough to avoid clashing. Complementary and triadic modes produce more contrast and work well for accents or data visualization, but check readability before using a bright, high-contrast pair for text on a background. When exporting CSS variables, the generated names are sequential (--color-1, --color-2, and so on) — rename them to something semantic, like --color-primary or --color-accent, once the palette is finalized.