Complementary
Two colors positioned directly opposite each other on the color wheel — creating maximum hue contrast.
What it means
Complementary colors sit 180° apart on the color wheel. Red and cyan, blue and orange, yellow and violet are classic complements. When placed side by side, complements create the strongest possible hue contrast — each makes the other appear more vivid through simultaneous contrast.
Complementary pairs are powerful but risky. Used at full saturation and equal area, they can vibrate uncomfortably. The key is imbalance: use one complement as the dominant (60–80% of the palette) and the other as a sharp accent.
Why it matters in palette design
Complementary contrast is the most effective way to make a single element stand out. An orange CTA on a blue interface is instantly visible because the hue contrast is maximal. PerfectPalette's harmony analysis checks for complementary relationships as one of the core harmony patterns.
Common confusion
Complementary vs. split-complementary: A true complement is one color 180° away. A split-complementary uses the two colors flanking the complement (e.g., ≈150° and ≈210° from the base), which reduces the intensity of the contrast while preserving visual interest.
Example
A financial app uses deep blue (#1E40AF) as its primary. Its complement — warm amber (#F59E0B) — is reserved exclusively for the most important actions and alerts. The 180° hue contrast makes those elements impossible to miss.
Learn more
Apply this to your palette
Open PerfectPalette and put these concepts into practice with your own colors.