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 #21201E is the color #1E1F21

The HSL model was used to determine the complementary color

Input Color

HEX #21201E
RGB 33, 32, 30
CMYK 0%, 3%, 9%, 87%
HSL 40°, 4.76%, 12.35%

Complementary Color

HEX #1E1F21
RGB 30, 31, 33
CMYK 9%, 6%, 0%, 87%
HSL 220°, 4.76%, 12.35%

Complementary color scheme

#1E1F21

#201E21

#211E1F

#21201E

#1F211E