Color Palette Generator

generate harmonious color palettes from a base color

By Bikram NathLast updated May 19, 2026

Paste any hex color and this tool derives five harmony relationships from it — complementary, analogous, triadic, split-complementary, and tetradic — using HSL angle arithmetic on the color wheel. Feed it #3B82F6 and you get the exact opposite hue (#F6943B) plus four coordinated families. The scheme types are the distinguishing feature: most ad-hoc palette pickers only offer complementary.

Try it now — free, instant, no signup

What is Color Palette Generator?

Color Palette Generator takes a single base color in hex format and applies classical color-wheel relationships to produce coordinated color sets. The math runs in HSL space: the tool rotates the hue component by fixed angles (180° for complementary, ±30° for analogous, 120°/240° for triadic, and so on) while preserving the original saturation and lightness. Feed it a brand's primary blue and get five different palette families ready to evaluate side by side.

Designers often reach for Coolors.co or Adobe Color for this kind of work, and both are perfectly fine for visual exploration. This tool is the right choice when you already have a locked-in hex value — a client-supplied brand color or a token from an existing design system — and need to derive harmonics from that specific anchor without dragging sliders around. Paletton does similar angle math but requires learning its own UI; this tool accepts a bare hex string and returns results immediately.

One gotcha: HSL hue rotation produces mathematically correct harmonics, but human perception is not uniform across hue ranges. Two colors 180° apart in HSL can feel jarring rather than balanced if one sits in the high-chroma yellow band (~60°) and the other in the low-chroma blue band (~240°). If generated complements look off-balance rather than harmonious, the culprit is usually this perceptual non-uniformity. Run the results through the color-contrast-checker tool on this site to validate readability before committing to a palette.

When to use Color Palette Generator

✓Derive a secondary button color from a brand hex you received as a design token and cannot change.

→Prototype three or four candidate UI themes quickly when a client asks to 'see some options' before a kickoff.

⚡Verify that a chosen accent hue has a triadic partner that won't clash with an existing background already in the stylesheet.

Frequently Asked Questions

Why do complementary colors generated here sometimes look jarring instead of balanced?

The tool rotates hue by exactly 180° in HSL space, which is mathematically correct but perceptually uneven. HSL hue is not designed around human vision — the yellow range (~50°–70°) appears far more saturated to the eye than the equivalent blue range (~220°–240°) at the same HSL saturation value. So a high-chroma yellow paired with its HSL complement often looks unbalanced. The fix is to manually reduce saturation on whichever half of the pair feels too loud, then check contrast ratios. A perceptually uniform space like LCH or OKLCH would distribute this more evenly, but that requires a different tool.

What is the practical difference between split-complementary and triadic schemes?

Triadic splits the wheel into three equal 120° segments, giving three hues with maximum visual tension between all of them — dramatic but hard to balance. Split-complementary takes your base color, skips the direct complement, and instead uses the two hues flanking it (typically ±30° from the complement). The result is almost as much contrast as complementary but with more flexibility because the two non-base colors are closer together in hue and therefore easier to use as supporting rather than competing colors. Split-complementary is generally the safer starting point for UI work; triadic suits illustration or data visualization where you need three clearly distinct categorical colors.

Can I use the output hex codes directly as CSS custom properties?

Yes. Copy any hex value from the palette and drop it into a CSS custom property declaration like `--color-accent: #F6943B;`. If you need oklch or hsl formats instead, paste the hex into the color-converter tool on this site, which handles the conversion without rounding issues. For a full design-token workflow, you would normally also run each palette color through color-shades-generator to produce light-to-dark tint steps, giving you a complete set of tokens (e.g. `--color-accent-100` through `--color-accent-900`) before wiring anything into Tailwind or a CSS-in-JS system.

Does the tool account for WCAG contrast requirements when building a palette?

No, and that is intentional. Generating harmonics and validating readability are separate concerns. A triadic palette can be visually coordinated but still fail WCAG AA at 4.5:1 when used as text on a light background. After generating a palette here, take each candidate color over to the color-contrast-checker tool and test it against your actual background values. The contrast checker will tell you whether a pair passes AA or AAA for normal text, large text, or UI components. Do not skip this step — color-wheel harmony does not imply accessibility compliance.

Why does changing saturation or lightness on my base color sometimes produce unexpected harmony results?

The hue angle arithmetic is applied only to the H component of HSL. Saturation and lightness from your input are preserved as-is across all generated swatches. If you feed in a very desaturated base (say, HSL 210°, 15%, 50%), all five palette families will also be low-saturation, and hue differences become nearly invisible because muted colors converge toward gray at low chroma. For palette generation to show meaningful variation, start with a base color that has at least 40–50% HSL saturation. If your locked-in brand color is highly desaturated, boost saturation temporarily to explore harmonics, then map results back to the muted range.

Related Tools

Colors

Color Converter

convert between HEX, RGB, HSL, HSB, and CMYK color formats

Colors

Color Contrast Checker

check WCAG color contrast ratio for accessibility compliance

Colors

Color Shades Generator

generate tints and shades of any color for design systems

CSS

CSS Gradient Generator

generate CSS linear, radial, and conic gradients visually