ToolPuma Logo

Complementary Color Generator

Find complementary and split-complementary colors.

Base
Complementary
Split −150°
Split +210°

What Is a Complementary Color Generator?

The Complementary Color Generator is a free online color-theory tool for finding the color opposite a selected hue on the color wheel. Enter or choose a base color to instantly generate its complementary color and split-complementary alternatives. Complementary colors create strong visual contrast and can be useful for call-to-action buttons, accents, branding, illustrations, posters, dashboards, and interface highlights. The results can be copied as HEX values and used directly in design or CSS.

How to Use This Complementary Color Generator

  1. 1
    Choose a base colorSelect the main color you want to build a color combination around.
  2. 2
    Find the complementary colorThe tool calculates the color positioned opposite the base color on the color wheel.
  3. 3
    Compare split-complementary optionsReview the neighboring alternatives when you want contrast with a softer visual relationship.
  4. 4
    Copy the paletteCopy the HEX values or the complete color combination and use them in your design project.

Frequently Asked Questions

A complementary color is positioned approximately 180 degrees opposite another color on a traditional color wheel. The pair creates strong contrast, which can make important elements stand out.
Enter or choose the HEX color as the base color. The generator calculates the corresponding complementary hue and provides the resulting color value for you to copy.
A split-complementary scheme uses the two colors adjacent to the direct complement. It keeps strong contrast while usually creating a less intense combination than using a single direct complement.
They work especially well when you want an accent to stand out against a dominant color. For example, a complementary hue can be used for a call-to-action, notification, badge, or highlighted interface element.
Not automatically. Complementary colors can create very strong contrast and may look intense when both are used at full saturation. Using one as the dominant color and the other as an accent often produces a more balanced result.
Yes. Complementary schemes can create memorable and energetic branding. Before finalizing a brand palette, consider readability, reproduction across media, accessibility, and how the colors work with typography and supporting neutrals.

Related Color & Design Tools

Color Picker

Pick any color and get its HEX, RGB, and HSL values.

Color Palette Generator

Generate a harmonious color palette from a base color.

Random Color Generator

Generate random colors with HEX, RGB, and HSL values.

Gradient Generator

Create smooth two-color linear gradients instantly.

CSS Gradient Generator

Build linear or radial CSS gradients with color stops.

CSS Box Shadow Generator

Design box shadows and copy the CSS code.

More Color & Design Tools

CSS Border Generator

Style borders with width, style, color, and radius.

CSS Border Radius Generator

Round element corners with live CSS output.

CSS Button Generator

Create styled buttons and copy the CSS code.

CSS Glassmorphism Generator

Make frosted glass style panels with backdrop blur.

CSS Neumorphism Generator

Generate soft UI neumorphism shadows with CSS.

CSS Text Shadow Generator

Add depth to text with custom text shadows.