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Color Palette Generator

A colour palette generator builds a small set of harmonious colours from a single base hue using formal colour-theory relationships — analogous, complementary, split-complementary, triadic, tetradic, monochromatic — so designers can scaffold a brand or UI palette in seconds rather than guessing. The ZTools Colour Palette Generator lets you pick any starting colour (hex, RGB, HSL, or pulled from an image), choose a harmony rule, fine-tune saturation and lightness across the resulting swatches, and export the palette as JSON, CSS variables, Tailwind config, Adobe ASE, or an SVG swatch sheet for handoff.

Use cases​

Brand kickoff​

You have a brand primary blue. Generate a 5-swatch analogous palette to anchor the rest of the brand system in 60 seconds.

UI design tokens​

Build a 5–7 colour token set (primary, secondary, accent, neutral light, neutral dark) ready for the design system.

Marketing assets​

Posters and social-media graphics stay coherent when every asset pulls from the same five-colour set. Generate once, reuse forever.

Data visualisation​

Categorical chart palettes need distinct, balanced hues. Triadic or tetradic harmony provides perceptually distinct categorical colours.

How it works​

  1. Pick a base colour — Type a hex, drag the colour wheel, or pull a colour from an image upload via the Image Color Extractor integration.
  2. Choose a harmony rule — Analogous (calm), complementary (high-contrast), split-complementary, triadic (balanced), tetradic (rich), monochromatic (subtle).
  3. Adjust saturation and lightness — Per-swatch sliders to soften or boost. The base hue stays anchored; surrounding swatches shift around it.
  4. Reorder and pin swatches — Drag to reorder; pin a swatch to lock it while regenerating others.
  5. Export — JSON, CSS custom properties, Tailwind 3/4 colour fragment, Adobe ASE for Illustrator/Photoshop, or SVG swatch sheet.

Examples​

Input: Base #6B5BFF, analogous

Output: #3B5BFF, #5B5BFF, #6B5BFF, #855BFF, #A55BFF

Input: Base #FF6B5B, complementary

Output: #FF6B5B and #5BFFEF — high-contrast pair

Input: Base #00C2FF, triadic

Output: #00C2FF, #C2FF00, #FF00C2 — three perceptually distinct hues

Frequently asked questions​

Which harmony rule should I pick?

Brand-friendly: analogous (calm) or complementary (vibrant). Categorical chart colours: triadic or tetradic. Subtle UI: monochromatic.

Are the swatches WCAG-accessible?

The generator includes contrast ratios for every pair; check before pairing as text/background. Add neutral light + dark to the palette so any swatch has a readable companion.

Can I match a competitor's palette?

Run their hero photo through the Image Color Extractor → take the dominant colour → use it as your base here. Result is "in the same family" without copying.

Does it produce light + dark variants?

Yes — toggle "shades and tints" to add lighter and darker steps for each colour, useful for hover states and disabled buttons.

How many colours fit in a UI palette?

5–7 is the sweet spot. Beyond that, cognitive load on designers and devs starts to hurt consistency.

Can I export as Tailwind 4 theme JSON?

Yes — the export emits a theme.colors snippet ready to paste into your Tailwind config or @theme block.

Tips​

  • Pin the base hue and regenerate — the harmony shifts around it, letting you explore variants quickly.
  • For UI, always add neutral grey/white/black even when the harmony focuses on colour — pure colour palettes look amateur on real interfaces.
  • Validate every text/background pair against WCAG AA (4.5:1) before shipping.
  • Save the JSON in your repo as the source of truth; regenerate Tailwind config from it on demand.
  • For data viz, prefer triadic — three distinct hues that map cleanly to three categories.

Try it now​

The full Color Palette Generator runs in your browser at https://ztools.zaions.com/color-palette — no signup, no upload, no data leaves your device.

Open the tool ↗

Last updated: 2026-05-05 · Author: Ahsan Mahmood · Edit this page on GitHub