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 #121E2B is the color #2B1F12

The HSL model was used to determine the complementary color

Input Color

HEX #121E2B
RGB 18, 30, 43
CMYK 58%, 30%, 0%, 83%
HSL 211.2°, 40.98%, 11.96%

Complementary Color

HEX #2B1F12
RGB 43, 31, 18
CMYK 0%, 28%, 58%, 83%
HSL 31.2°, 40.98%, 11.96%

Complementary color scheme

#2B1F12

#1E2B12

#122B1F

#121E2B

#1F122B