Complementary Color Calculator

Calculate the exact complementary color (180° opposite on the color wheel) for any HEX, RGB, or HSL color code to create bold, high-contrast visual accents.

Enter a base color, choose a harmony mode, and get an instant palette. Export to CSS variables, Tailwind config, or JSON.

HARMONY MODE
#6366F1
#F2EF64
:root {
  --color-1: #6366F1;
  --color-2: #F2EF64;
}

🔒 All color processing happens 100% in your browser — no data is sent anywhere.

Common Real-World Use Cases

Call-to-Action (CTA) Buttons

Find high-converting contrasting accent colors for buttons and badges against background tones.

Frequently Asked Questions

What is a complementary color?

Complementary colors are pairs of colors located directly opposite each other on the 360° color wheel (e.g. Blue and Orange, Purple and Yellow).

Other Color Converters & Tools

🎨 HEX to RGB Color Converter🎨 RGB to HEX Color Converter🎨 HEX to HSL Color Converter🎨 Harmonious Color Palette Generator⚙️ Full Color Studio →
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