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 #2121FF is the color #FFFF21

The HSL model was used to determine the complementary color

Input Color

HEX #2121FF
RGB 33, 33, 255
CMYK 87%, 87%, 0%, 0%
HSL 240°, 100%, 56.47%

Complementary Color

HEX #FFFF21
RGB 255, 255, 33
CMYK 0%, 0%, 87%, 0%
HSL 60°, 100%, 56.47%

Complementary color scheme

#FFFF21

#21FF21

#21FFFF

#2121FF

#FF21FF