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 #21474A is the color #4A2421

The HSL model was used to determine the complementary color

Input Color

HEX #21474A
RGB 33, 71, 74
CMYK 55%, 4%, 0%, 71%
HSL 184.39°, 38.32%, 20.98%

Complementary Color

HEX #4A2421
RGB 74, 36, 33
CMYK 0%, 51%, 55%, 71%
HSL 4.39°, 38.32%, 20.98%

Complementary color scheme

#4A2421

#474A21

#214A24

#21474A

#24214A