Complementary Color Generator

What Complementary Color Generator does

Generate the hue opposite a base color and copy both colors in multiple formats.

Worked example

Color calculation

The complement adds 180 degrees to hue modulo 360 while retaining the selected saturation and lightness.

Useful workflows

• Create design tokens, chart series, states or illustration palettes.
• Compare copied color values with the visible preview and source format.
• Use image sampling to match an existing visual reference locally.

Accessibility and output checks

• Palette harmony does not guarantee readable text contrast; test WCAG contrast for each foreground/background pair.
• Displays, browsers, color profiles and printing can render the same numeric color differently.
• Rounded conversions can differ by one channel unit when converted back and forth.

Frequently asked questions

Why does the converted value differ slightly?

HEX and RGB use integer channels while HSL and HSV often require rounded decimal conversions.

Are uploaded images sent to a server?

The image color tools decode and sample supported images in the browser unless the page explicitly states otherwise.

Can I adjust the angle of the complementary color?

No, the opposite angle is fixed at 180 degrees on the hue wheel. The tool always generates the exact opposite hue.

Does the complementary color guarantee good contrast?

No, complementary hues do not guarantee sufficient contrast for text. Always test contrast separately for accessibility.