Complementary Color
Find the complementary color (180° opposite on the color wheel) for any color.
Find the Perfect Contrast
Complementary colors are opposite each other on the color wheel. They create strong visual contrast and work great for highlighting important elements like call-to-action buttons.
Tool Features
180° Opposite
Get the exact opposite color on the color wheel for maximum contrast.
One-Click Copy
Click any color in the pair to copy its HEX code instantly.
Visual Pair
See both colors side-by-side to evaluate the contrast.
Color Picker
Use the visual picker or enter HEX codes directly.
How this Complementary Color works
The Complementary Color tool calculates the exact complementary color for any input color using browser-based processing. You provide a color in HEX, RGB, or HSL format, and the algorithm converts it to the HSL color model, rotates the hue by exactly 180 degrees on the color wheel, and converts the result back to your preferred format. This mathematical approach guarantees a true complementary pair every time.
The tool displays both your original color and its complement side by side with large preview swatches, making it easy to evaluate how the pair works together visually. Output values are provided in HEX, RGB, and HSL simultaneously so you can immediately use them in CSS stylesheets, design tools, or illustration software. Additional context about complementary color theory helps you understand why certain pairings create visual harmony or dynamic contrast.
Every computation happens entirely within your browser using lightweight JavaScript, ensuring your creative work stays private and the results appear without any delay. No account or installation is required. This makes it an essential quick-reference tool for web designers choosing accent colors, artists planning compositions, or anyone exploring color theory fundamentals.
Explore more color palettes with our Analogous Color Scheme Generator.
How to use this Complementary Color
Enter Color
Input your base HEX color.
Generate
Get the complementary color.
Copy
Click to copy the color code.
Example Usage
Finds the 180° opposite of a medium blue on the color wheel, producing a warm orange complementary pair for high-contrast design.
Frequently Asked Questions
What is a complementary color?
When to use complementary colors?
Related Tools
Split Complementary Colors
Get the split complementary colors
Triad Color Scheme
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Tetrad Color Scheme
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Analogous Color Scheme
Get the colors of the analogous scheme
Monochromatic Colors Generator
Get monochromatic colors
Square Color Scheme
Get the colors of the square scheme
The Complementary Color is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.
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