Complementary Color Finder
Find perfect complementary colors positioned opposite on the color wheel for maximum contrast. Generate traditional complementary, split-complementary, and double complementary (tetradic) schemes. Essential for creating high-impact designs with bold color relationships.
Two colors opposite on the color wheel (180° apart) for maximum contrast
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Complete Guide: Complementary Color Finder
Everything you need to know about using this tool effectively
The Complementary Color Finder calculates the opposite color on the color wheel for any base color you enter. The complementary color is 180 degrees away on the HSL hue wheel. The tool shows both the base and complementary colors with their hex, RGB, and HSL values. All processing happens in the browser.
This tool takes a base color in HSL, adds 180 degrees to the hue component (wrapping around 360), and converts the result back to hex and RGB. The complementary color has maximum hue contrast with the base while sharing similar saturation and lightness.
Creating high-contrast color pairs
Find a complementary color for a button background to ensure the text stands out.
Designing accent colors
Use the complementary color as an accent against a primary brand color.
Art and illustration
Find colors that create visual tension and vibrancy when placed next to each other.
Web design hover states
Use the complementary color for hover effects that create strong visual feedback.
Pick a base color
Use the color picker or enter a hex code.
View the complementary color
The tool shows the opposite color with its hex, RGB, and HSL values.
Compare both colors
See the base and complementary colors side by side.
Copy a color
Copy either the base or complementary color value.
Complementary colors create strong contrast and visual interest.
They work well for call-to-action buttons against a neutral background.
Avoid using complementary colors at full saturation for large areas, as the contrast can be jarring.
Desaturate one of the pair for a more balanced look.
What is a complementary color?
A complementary color is the color directly opposite on the color wheel (180 degrees apart in hue). It creates the strongest color contrast.
How is it calculated?
The tool adds 180 degrees to the hue value in HSL space. Saturation and lightness are preserved.
Is my data sent to a server?
No. All calculation happens in your browser. Nothing is transmitted.
What formats are shown?
Both colors are shown in hex, RGB, and HSL formats.
Can I use complementary colors in a design?
Yes. They create strong visual contrast. For best results, use one as the dominant color and the other as a small accent.
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