Readdy AI

HEX Color Palette Generator

Start from one HEX color and generate a complete palette with tonal scale, harmony colors, semantic tokens, and copy-ready CSS variables.

Base Color (HEX)
Supports #RGB or #RRGGBB, for example #0EA5E9

Quick Presets

Palette Overview
See your base color relationships and build a consistent system faster.

Base Color (HEX)

#2563EB

Hue: 221Saturation: 83%Lightness: 53%

Harmony Colors

Analogous A
#45C7E4
Analogous B
#6345E4
Complementary
#E6AB2A
Triadic A
#E2386D
Triadic B
#6DE238
Tonal Scale (50 - 900)
Light-to-dark shades ready for backgrounds, borders, states, and text contrast.
50
#F4F6FB
100
#D1DBF1
200
#ABBFEB
300
#82A2E7
400
#5583E8
500
#2563EB
600
#124BC7
700
#0D3794
800
#082462
900
#04112F
Semantic Tokens
Use these roles directly in UI to keep product visuals and brand style consistent.
Primary

Primary

Main brand and CTA color

#2563EB
Secondary

Secondary

Supporting brand color

#6C59D5
Accent

Accent

High-contrast highlights

#E3AA2D
Background

Background

Page-level background tone

#F7F7F8
Surface

Surface

Cards and surface containers

#E8E9EE
Text

Text

Default body text color

#1B212C
CSS Variables
Copy once and drop into your stylesheet.
:root {
  --color-primary: #2563EB;
  --color-secondary: #6C59D5;
  --color-accent: #E3AA2D;
  --color-background: #F7F7F8;
  --color-surface: #E8E9EE;
  --color-text: #1B212C;
  --color-primary-50: #F4F6FB;
  --color-primary-100: #D1DBF1;
  --color-primary-200: #ABBFEB;
  --color-primary-300: #82A2E7;
  --color-primary-400: #5583E8;
  --color-primary-500: #2563EB;
  --color-primary-600: #124BC7;
  --color-primary-700: #0D3794;
  --color-primary-800: #082462;
  --color-primary-900: #04112F;
}

How to Build a Complete Color System from One HEX Code

This tool turns a base HEX color into a structured palette in real time. You can manually enter a HEX value, pick from the color selector, or generate a random color to explore new directions. Instantly, you'll see a full Palette Overview with harmony colors, tonal scales, semantic tokens, and ready-to-copy CSS variables.

1

Enter or Select a Base Color

Input a HEX color code directly, choose a color from the picker, or click "Random Color" to generate one automatically.

2

View the Palette Overview

See your base color alongside automatically generated harmony colors that complement and extend your design.

3

Explore Tonal Scale & Semantic Tokens

Review the tonal scale (50–900) with light-to-dark shades ideal for backgrounds, borders, states, and text contrast. Semantic tokens are also generated for practical UI usage.

4

Copy CSS Variables or Tokens

Copy the generated CSS variables or semantic roles with one click and paste them directly into your stylesheet.

Structured Color Palettes for Real Projects

This HEX Color Palette Generator goes beyond basic swatches. It creates structured, system-ready palettes that can be used immediately in product interfaces, design systems, and branding workflows.

  • Harmony-Based Color Generation

    Automatically generate complementary harmony colors that maintain visual balance and contrast.

  • Tonal Scale (50–900)

    Light-to-dark shades optimized for UI layers, states, backgrounds, and readable text contrast.

  • Semantic Tokens for UI Consistency

    Predefined roles help maintain consistent usage across primary actions, success states, warnings, and neutral elements.

  • Copy-Ready CSS Variables

    Export your entire palette as CSS variables with one click—ready for implementation in your stylesheet.

Frequently Asked Questions

It's a tool that creates a complete color palette based on a single HEX color value, including tonal variations and harmony colors.
Yes. You can input any valid HEX color, select one manually, or generate a random color.
The tonal scale (50–900) provides structured shades for backgrounds, borders, hover states, and accessible text contrast.
Simply copy the variables and paste them into your CSS file or design system configuration.

Create a Scalable Color Palette in Seconds