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 #1B313D is the color #3D271B

The HSL model was used to determine the complementary color

Input Color

HEX #1B313D
RGB 27, 49, 61
CMYK 56%, 20%, 0%, 76%
HSL 201.18°, 38.64%, 17.25%

Complementary Color

HEX #3D271B
RGB 61, 39, 27
CMYK 0%, 36%, 56%, 76%
HSL 21.18°, 38.64%, 17.25%

Complementary color scheme

#3D271B

#313D1B

#1B3D27

#1B313D

#271B3D