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 #1B2121 is the color #211B1B

The HSL model was used to determine the complementary color

Input Color

HEX #1B2121
RGB 27, 33, 33
CMYK 18%, 0%, 0%, 87%
HSL 180°, 10%, 11.76%

Complementary Color

HEX #211B1B
RGB 33, 27, 27
CMYK 0%, 18%, 18%, 87%
HSL 0°, 10%, 11.76%

Complementary color scheme

#211B1B

#21211B

#1B211B

#1B2121

#1B1B21