Rectangular Tetradic Palette Generator
Generate two complementary color pairs with an adjustable rectangle angle. Processing takes place locally in your browser.
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What Rectangular Tetradic Palette Generator does
Generate two complementary color pairs with an adjustable rectangle angle.
Worked example
Input
Base hue 20°; angle 60°
Result
Hues 20°, 80°, 200° and 260°
Color calculation
The second hue is offset by the selected angle and both colors receive companions 180 degrees away.
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.
Processing takes place locally in your browser.