ToolKitSphereTetradic Color Scheme Generator
Generate 4-color tetradic (rectangular/square) color schemes.
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This tetradic color generator produces a rich four-color scheme from any base color, arranging the hues as two complementary pairs in either a rectangular or square configuration around the color wheel. It's suited to designers who need more color variety than a triadic scheme offers, such as data dashboards, illustrations, or multi-section brand systems where several distinct but harmonious colors are needed. Enter a base color and the tool calculates the remaining three hues automatically, showing all four with HEX, RGB, and HSL values and live swatches. Every calculation is performed locally in your browser, so nothing about your palette or project is ever uploaded or shared. Because tetradic schemes have the most colors of the standard harmony types, the tool carefully balances hue spacing so the four colors read as a coherent set rather than an arbitrary mix. Enter your base color below to generate a tetradic palette.
Features
- Generates 4-color rectangular or square tetradic schemes
- Accepts HEX, RGB, or HSL as base color input
- Displays all four swatches together for easy comparison
- Shows HEX, RGB, and HSL for each generated color
- One-click copy for any of the four colors
- Real-time recalculation as the base color changes
- Precise hue-wheel math for balanced spacing
- Handles both square (90°) and rectangular tetrad spacing
Why use this tetradic colors generator?
- Instant four-color palette generation
- Fully client-side so your palette stays private
- Balanced, exact hue-wheel math for coherent results
- Simple single-input workflow
- Completely free with unlimited generations
Frequently asked questions
What is a tetradic color scheme?
A tetradic (or rectangle) scheme uses four colors arranged as two complementary pairs, giving a rich palette with plenty of contrast and variety.
What's the difference between square and rectangular tetradic?
A square tetrad spaces all four hues 90 degrees apart evenly, while a rectangular tetrad uses two closer hues and two complementary pairs with uneven spacing between them.
Is tetradic harder to use than triadic?
Yes, with four colors it's easier for a palette to feel unbalanced, so designers typically let one color dominate and use the rest as supporting accents.
Can I adjust saturation or lightness after generating?
The tool generates hues based on your base color's saturation and lightness; you can enter a different base color to explore other saturation and lightness combinations.
Are tetradic schemes good for data visualization?
They can work well when you need several visually distinct categories, though you should still verify sufficient contrast between adjacent colors for clarity.
How does tetradic differ from a random 4-color palette?
Tetradic colors follow strict hue-wheel spacing rules, giving a mathematically balanced relationship that a fully random palette wouldn't guarantee.