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 #0A2121 is the color #210A0A

The HSL model was used to determine the complementary color

Input Color

HEX #0A2121
RGB 10, 33, 33
CMYK 70%, 0%, 0%, 87%
HSL 180°, 53.49%, 8.43%

Complementary Color

HEX #210A0A
RGB 33, 10, 10
CMYK 0%, 70%, 70%, 87%
HSL 0°, 53.49%, 8.43%

Complementary color scheme

#210A0A

#21210A

#0A210A

#0A2121

#0A0A21