Color Palette Generator

What is a color palette?

A color palette is a curated set of colors chosen to work together visually. Designers use palettes to keep websites, brands, illustrations and dashboards consistent, because repeating the same handful of colors creates rhythm and recognition. A palette typically includes a dominant color, one or two accent colors, and a set of neutral or supporting tones. Rather than picking colors at random, designers rely on color harmony rules — analogous, complementary, triadic, tetradic and monochromatic — that produce visually pleasing combinations based on the geometry of the color wheel.

This tool implements those five classic harmony rules and regenerates the palette the moment you change the base color. The math runs entirely in your browser using HSL transformations, so you can experiment freely without uploading anything.

When to generate a color palette

Generating a palette up front saves time and prevents the visual chaos of ad-hoc color choices. Common scenarios include:

• Starting a new website or app. Pick one brand color and let the generator produce supporting accents and neutrals.
• Building a design system. Token names like --accent, --accent-complement and --accent-triadic-2 map directly onto the generated swatches.
• Illustration and data viz. Triadic and tetradic palettes give enough distinct hues for multi-series charts without clashing.
• Marketing assets. A complementary pair creates strong contrast for call-to-action buttons against a brand background.
• Theming and rebranding. Change the base color and the whole palette follows, making light/dark or seasonal themes trivial.
• Learning color theory. Watching how hue offsets translate into harmony rules builds intuition faster than reading about them.

Once you have a palette, lock it into CSS variables or design tokens so every component references the same source of truth.

Palette harmony rules explained

The five harmony rules this tool generates are based on hue angles in the HSL color wheel:

• Analogous. Colors whose hues sit next to each other on the wheel (typically ±30° and ±60°). The result feels calm and cohesive because the hues share a common base.
• Complementary. Two hues directly opposite each other (180° apart). The pairing creates maximum contrast and vibrancy — ideal for accents on a dominant background.
• Triadic. Three hues evenly spaced around the wheel (120° apart). The result is vivid but balanced, useful for playful or bold designs.
• Tetradic. Four hues evenly spaced (90° apart), forming a rectangle on the wheel. It offers rich variety but needs one color to dominate so the others don't compete.
• Monochromatic. A single hue with varying lightness (and sometimes saturation). The result is subtle and sophisticated, perfect for minimal or text-heavy interfaces.

All five rules are derived from the same base hue, so they share a family resemblance even when they look very different.

Common palette use cases

The table below shows how each harmony rule maps to a typical design use.

Rule	Hue offset	Best for
Analogous	±30°, ±60°	Cohesive backgrounds, gradients, nature themes
Complementary	180°	Call-to-action buttons, high-contrast accents
Triadic	0°, 120°, 240°	Playful branding, multi-series charts
Tetradic	0°, 90°, 180°, 270°	Rich illustrations, four-category dashboards
Monochromatic	0° (vary lightness)	Minimal UI, typography, elegant themes

For best results, choose one color as the dominant tone, another as support, and use the rest sparingly as accents.

How to generate a palette

Generating a palette with this tool takes only a second and happens entirely inside your browser. No upload, no sign-up, and no installation are required. Follow these steps:

1. Pick a base color. Use the color picker, or type a 6-digit HEX code (with or without #) into the HEX field.
2. Review the palettes. The five harmony rows update in real time, each showing the generated HEX codes underneath the swatches.
3. Copy the codes. Click "Copy All HEX" to copy every swatch's HEX value, then paste them into your CSS, design tool or style guide.

Because every step runs locally in your browser using JavaScript, your color choices are never uploaded to a server. This makes palette generation completely private and instant.