UI & product design
Build primary, secondary, and surface colors that stay consistent across screens.
Free · no signupColor theory harmoniesCSS · Tailwind · JSONRuns in your browser
Why generate palettes here
Six harmony engines
Complementary, analogous, triadic, tetradic, monochromatic, and split-complementary — grounded in classic color theory.
Lock & refine
Lock colors you love, regenerate the rest, and keep iterating until the scheme feels right.
Dev-ready exports
Copy CSS variables, Tailwind tokens, SCSS maps, or JSON — paste straight into your design system.
WCAG contrast checks
Test text-on-background pairs from your palette so UI stays readable and accessible.
Instant feedback
Swatches, UI mockups, and codes update live. No upload, no wait, no account.
Free & unlimited
Unlimited palettes for personal and commercial projects. No watermarks.
How to create a color palette
- 1
Pick a base color
Use the color picker or type a HEX code. This anchors every harmony calculation.
- 2
Choose a harmony rule
Switch between complementary, analogous, triadic, and more to explore different moods.
- 3
Lock, randomize, refine
Lock keepers, hit regenerate or Space for a new base, and fine-tune until it fits your brand.
- 4
Export to your stack
Copy HEX/RGB/HSL or export CSS, Tailwind, SCSS, or JSON for designers and developers.
From one HEX code to a full design system seed
Harmony rules, contrast checks, and export formats that designers and developers actually ship.
01
Why color harmony beats random swatches
Random colors rarely share a relationship. Harmony rules place hues on the color wheel with intention — opposite for energy, neighbors for calm, evenly spaced for playfulness — so interfaces feel deliberate instead of noisy.
02
Complementary vs analogous for product UI
Complementary pairs punch CTAs against backgrounds. Analogous sets suit dashboards and long-read layouts where calm continuity matters. Switch rules on the same base to compare moods instantly.
03
Export paths for modern stacks
CSS variables power any framework. Tailwind maps drop into config files. SCSS maps feed Sass design systems. JSON travels to design tools and documentation. One palette, every handoff.
04
Accessibility as a first-class feature
Pretty is not enough if body text fails AA. Checking contrast while you still have the picker open prevents expensive redesigns after accessibility review.
Who uses a color palette generator
From brand kits to product UI — balanced schemes start with solid color theory.
Brand identity
Explore complementary or monochromatic systems before committing to brand guidelines.
Frontend development
Export CSS variables or Tailwind tokens so engineering matches the design file.
Marketing & social
Generate campaign palettes that stay on-brand across ads, decks, and landing pages.
Data visualization
Pick sequential monochromatic or categorical triadic sets for clearer charts.
Learning color theory
See how harmony rules shift a single base into professional multi-swatch schemes.
Color palette tips that actually help
Small habits that separate “pretty swatches” from usable design systems.
- 1
Start with brand or product constraints
If you already have a primary brand HEX, lock it and generate around it — don’t invent a fifth random accent.
- 2
Check contrast early
A beautiful pair that fails WCAG AA will break buttons, body text, and forms. Test text on surfaces before shipping.
- 3
Prefer fewer, stronger roles
Name colors by role (primary, accent, muted, danger) not only by hue. Five swatches become a system when roles are clear.
- 4
Export once, reuse everywhere
Put CSS variables or Tailwind tokens in one source of truth so marketing sites and product UI don’t drift.
FAQ
Frequently asked questions
What is a color palette generator?
It is a tool that builds a set of coordinated colors from a starting color or rule. This generator applies color-theory harmonies so the resulting swatches work together for UI, branding, and design systems.
Which harmony rules are supported?
Complementary, analogous, triadic, tetradic (rectangle), monochromatic, and split-complementary — the six rules designers use most for balanced schemes.
Can I lock colors I like?
Yes. Lock any swatch, then regenerate unlocked colors or randomize the base. Locked colors stay put so you can refine without losing keepers.
How do I export the palette for code?
Use Export to copy CSS custom properties, a Tailwind color map, SCSS map, or JSON. You can also click each swatch to copy HEX, RGB, or HSL.
What is WCAG contrast and why check it?
WCAG defines minimum contrast between text and background for accessibility. The built-in checker measures pairs from your palette so UI text remains readable.
Is this free for commercial projects?
Yes. Unlimited palettes, no account, and no watermarks. Generated colors and exported code are yours to use in client or commercial work.
Does my data leave the browser?
No. Color math, contrast checks, and clipboard exports run client-side. Nothing is uploaded to a server.
How many colors are in each palette?
Each harmony returns five coordinated swatches — enough for primary, accents, and supporting surfaces without overwhelming your system.
Professional color palettes from color theory
BosConvertPro Color Palette Generator turns one base color into a balanced multi-swatch scheme using proven harmony rules. Designers and developers can lock favorites, validate contrast, preview UI, and export production-ready tokens — entirely in the browser, free, with no signup.
- Six color-theory harmony modes
- Lock colors while regenerating others
- WCAG contrast ratio checker
- CSS, Tailwind, SCSS & JSON export
- HEX, RGB, HSL copy formats
- Free unlimited use in the browser