Free tool - no signup
UI Color Palette Generator
Build a UI palette and see it on a real interface, not five squares on a white board. Check the contrast, grab the CSS variables, and copy a share link. It all runs client-side, so your palette never leaves the browser.
UI Color Palette Generator
Pick four colors, watch them land on a real interface, and check the contrast before you ship. Hit Space to shuffle the unlocked swatches. Everything runs in your browser.
Design that reads at a glance
A quiet layout, one confident accent, and type that stays out of its own way. This is your palette on a working screen, not a swatch board.
Lock what works. Shuffle the rest until it clicks.
Judge color where it lives, on buttons and cards.
How to use it
- Set your four colors, or hit Generate palette (or the spacebar) to shuffle.
- Lock the swatches you want to keep, then shuffle the rest until the preview clicks.
- Watch the contrast panel. Aim for AA on body text before you commit.
- Pick a harmony rule if you want the accent to relate to the primary mathematically.
- Copy the CSS variables straight into your stylesheet, or copy the share link.
Why preview colors in context
Five swatches on a white background tell you almost nothing about whether a palette works on a dashboard or a landing page. The 60-30-10 rule only makes sense once you see it: the background carries about 60% of the surface, text and cards take 30%, and the accent gets the remaining 10% on the button and the tag. Overload the accent and the screen turns into a carnival. This tool shows you that the moment you shuffle.
Common questions
- Is this UI color palette generator free?
- Yes. It is completely free with no sign-up, no email gate, and no watermark. The whole tool runs in your browser, so nothing is uploaded anywhere. Generate as many palettes as you want.
- Can I share a palette I generated?
- Yes. Every palette is encoded in the page URL, so the "Copy share link" button gives you a direct link that reopens the exact colors you built. Send it to a client or teammate and they see the same live preview.
- Does it check WCAG contrast?
- It does. The tool shows the contrast ratio for body text on the background, the button label on the primary color, and the accent on the background, with an AA or AAA badge next to each. WCAG 2.1 AA needs 4.5:1 for normal text and 3:1 for large text.
- Does it support OKLCH?
- Each swatch shows its OKLCH value under the hex code. OKLCH is useful for building perceptually even tonal scales, and CSS supports it natively in every current browser.
Want the full breakdown of Coolors, Adobe Color, Realtime Colors, and Huemint? Read the guide: Color palette generators for UI design, tested.