How to determine complementary colors?
What are the different color models?

Determine Complementary Color

140 color names
216 web safe colors
2040 RAL colors
200 shades of gray

The complementary color of #21181A is the color #18211F

The HSL model was used to determine the complementary color

Input Color


HEX #21181A
RGB 33, 24, 26
CMYK 0%, 27%, 21%, 87%
HSL 346.67°, 15.79%, 11.18%

Complementary Color


HEX #18211F
RGB 24, 33, 31
CMYK 27%, 0%, 6%, 87%
HSL 166.67°, 15.79%, 11.18%

Complementary color scheme

#18211F
#181A21
#1F1821
#21181A
#211F18