Complementary Colors Explained (With Examples)

Complementary colors are pairs that sit directly opposite each other on the color wheel. Red and green, blue and orange, yellow and purple — these pairings create the strongest visual contrast of any two colors, which is why they show up everywhere from brand logos to movie posters.

Why complementary colors look good together

Each complementary pair contains no shared hue. Red is 0° on the wheel and green is 180°, so the two colors stimulate completely different color receptors in your eye. When placed side by side, each one makes the other look more vivid — an effect designers call simultaneous contrast.

This is different from analogous colors, which sit next to each other and feel calm and harmonious. Complementary schemes are energetic and attention-grabbing by nature.

The classic complementary pairs

• Red #FF0000 ↔ Green #008000 (see Red)
• Orange #FFA500 ↔ Blue #0000FF
• Yellow #FFFF00 ↔ Purple #800080
• Cyan #00FFFF ↔ Red #FF0000

Any color can be rotated the same way: its complement is exactly 180° around the wheel.

How to find a color's complement

Take any color's hue angle and add 180 degrees. If your color is at 210° (a blue like DodgerBlue), its complement is at 30° (an orange). Designers rarely use pure complements at full saturation, though — that much contrast can feel harsh or cause vibration at the edges of shapes.

A practical approach

1. Pick one dominant color for the interface or artwork.
2. Use its complement sparingly — for buttons, highlights or calls to action.
3. Mute one of the two colors (lower the saturation) to soften the pairing.

Generate your own harmonies

Typing hue math into your head is unnecessary. The color wheel shows complementary, analogous, triadic and monochromatic harmonies for any base color instantly. Once you have a direction, the color palette generator turns a single color into a full five-color palette you can copy as hex values, CSS or JSON.

You can also sample real-world inspiration: upload an image to the image color palette generator and see the complementary relationships inside a photograph you already like.

Rule of thumb: complementary colors create contrast and energy; analogous colors create calm. Most memorable designs mix both — a dominant analogous scheme with a single complementary accent.

Every color page in the color library includes its exact complementary hue, so the next time you are designing around Teal or Gold, the color that will make it pop is one click away.