Utility Tool

Color Palette Generator

Generate beautiful color palettes from a base color. Get complementary, analogous, triadic, and monochromatic schemes.

Base Color

Palette Type

Generated Palette

#3b82f6rgb(59, 130, 246)hsl(217, 91%, 60%)

#f6af3crgb(246, 175, 60)hsl(37, 91%, 60%)

#85b2f9rgb(133, 178, 249)hsl(217, 91%, 75%)

#cee0fdrgb(206, 224, 253)hsl(217, 92%, 90%)

#0a5adbrgb(10, 90, 219)hsl(217, 91%, 45%)

#073c92rgb(7, 60, 146)hsl(217, 91%, 30%)

#031e49rgb(3, 30, 73)hsl(217, 92%, 15%)

Palette Colors

Introduction

Choosing a cohesive color palette is one of the most impactful decisions in UI design, branding, and data visualization — yet building one from scratch often leads to clashing hues, inconsistent contrast ratios, and accessibility failures. A color palette generator applies established color theory algorithms to derive harmonious sets of colors from a single seed, ensuring that every swatch in the palette feels like it belongs together while maintaining sufficient contrast for WCAG compliance.

What Is Color Palette Generator?

A color palette generator takes a starting color and derives a set of related colors using mathematical relationships on the HSL color wheel. The most common harmonies are complementary (opposite on the wheel, 180° apart), analogous (adjacent, 30° apart), triadic (three equidistant colors at 120° intervals), and split-complementary (a base plus the two colors adjacent to its complement). Each harmony produces a fundamentally different mood: complementary palettes feel vibrant and attention-grabbing, while analogous palettes feel calm and cohesive.

The tool also generates tint and shade scales for any selected color — lighter versions created by increasing lightness toward white and darker versions by decreasing lightness toward black. These scales are essential for building design systems where you need a primary-50 (near-white background tint) through primary-900 (near-black text shade) from a single brand color. The generated scale follows perceptually uniform lightness steps so that the visual jump between adjacent stops feels even.

For accessibility-conscious design, the generator calculates the WCAG 2.1 contrast ratio between each color and both white and black text. Colors that fail the 4.5:1 AA threshold for normal text are flagged, and the tool can automatically suggest the nearest passing shade. This eliminates the common workflow of generating a beautiful palette only to discover in a Lighthouse audit that your button text is unreadable against its background.

Color Palette Generator Examples

Input	Output
Seed: #3B82F6, Harmony: Complementary	#3B82F6 (blue), #F97316 (orange) — 2-color complementary pair
Seed: #10B981, Harmony: Triadic	#10B981 (green), #F59E0B (amber), #8B5CF6 (violet)
Seed: #EF4444, Harmony: Tint-Shade Scale	#FEF2F2 (50) through #7F1D1D (900) — 11-stop perceptual scale

Key Features of Color Palette Generator

Five harmony modes: complementary, analogous, triadic, split-complementary, and tetradic (square)
Tint and shade scale generation producing 9 or 11 perceptually uniform stops from any seed color
WCAG 2.1 contrast ratio display for each color against white and black text
Automatic AA/AAA pass/fail flagging with nearest-passing shade suggestions
Export palette as CSS custom properties, Tailwind config, SCSS variables, or JSON array
Random palette generation with a lock mechanism to keep preferred colors while regenerating others
Image-based palette extraction that samples dominant colors from an uploaded photo or screenshot

How It Works

Choose a Base Color and Harmony Mode

Enter your starting color using the built-in picker, or paste a HEX code. Then select a color harmony type such as complementary, analogous, triadic, split-complementary, or tetradic. The harmony mode determines the mathematical relationship between the colors in your generated palette.

Generate and Refine Your Palette

The tool calculates the harmonic colors based on color theory principles and displays them side by side. Each swatch shows its HEX, RGB, and HSL values. You can adjust the base color or switch harmony modes and the entire palette recalculates instantly to reflect the change.

Export the Full Palette

Copy the entire palette as a set of HEX codes, or grab individual colors as needed. The tool can also output the palette in CSS custom property format, so you can paste it directly into a stylesheet as a ready-to-use set of design tokens.

Who Uses This

Brand Designers

building a complete brand color system from a single primary color by generating complementary and analogous shades that feel cohesive without the guesswork of manual selection

Frontend Developers

producing a set of harmonious CSS custom properties from the project's brand color so that background, accent, and state colors all derive from one consistent source

Presentation Designers

creating color palettes for slide decks that need to look professional and coordinated, starting from the company logo color and expanding into a full scheme

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Frequently Asked Questions

What color harmony modes are available?

The generator supports complementary, analogous, triadic, split-complementary, and tetradic harmonies. Each mode places the additional colors at specific angular offsets on the color wheel relative to your base color, following established color theory principles.

Can I adjust individual colors in the generated palette?

The initial palette is calculated automatically from the base color and harmony mode. To fine-tune, adjust the base color or switch harmony modes, and the entire palette updates. For individual color tweaks, note the values and manually adjust them in your design tool.

Does the generator account for accessibility contrast ratios?

The tool focuses on color harmony relationships. For accessibility, you should verify text-background contrast using a dedicated contrast checker. A good workflow is to generate the palette here and then validate combinations against WCAG guidelines separately.