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 #21201F is the color #1F2021

The HSL model was used to determine the complementary color

Input Color

HEX #21201F
RGB 33, 32, 31
CMYK 0%, 3%, 6%, 87%
HSL 30°, 3.13%, 12.55%

Complementary Color

HEX #1F2021
RGB 31, 32, 33
CMYK 6%, 3%, 0%, 87%
HSL 210°, 3.13%, 12.55%

Complementary color scheme

#1F2021

#201F21

#211F20

#21201F

#20211F