Color Theory

Tetradic Colors

Tetradic or rectangular color schemes use four colors arranged in two complementary pairs on the color wheel. This creates the richest, most complex color combinations available, offering tremendous variety and potential for layered, sophisticated spaces. However, tetradic schemes are also the most challenging to balance successfully. The key to working with tetradic schemes is choosing one color to dominate while using the other three as supporting players. These schemes work best when colors are adjusted in saturation and value—rarely do four fully saturated colors create livable spaces. Tetradic schemes excel in eclectic interiors, gallery walls, and spaces where richness and complexity are design goals.

Key Characteristics

  • Four colors in two complementary pairs
  • Most complex color schemes available
  • Creates rich, layered environments
  • Requires careful balance to succeed
  • One color must dominate the others
  • Best used with varied saturation and values

Types & Variations

Rectangular (blue, orange, yellow-orange, blue-purple)
Square (evenly spaced four colors)
Warm-dominant tetradic
Cool-dominant tetradic
Muted tetradic (reduced saturation)

Works Well With These Styles

Placement & Usage Tips

Use the 60-30-10 rule extended to 60-20-10-10 for tetradic schemes. The dominant color should appear on walls or large furniture, with decreasing amounts of the other three colors. Vary the saturation—not all four colors should be at full intensity.

💡 Pro Tip

When working with tetradic schemes, choose your four colors but then use the tint, shade, or tone of each throughout the room. This creates unity while maintaining complexity—you'll have 12+ color variations working in harmony.