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 #66C900 is the color #6100C9

The HSL model was used to determine the complementary color

Input Color


HEX #66C900
RGB 102, 201, 0
CMYK 49%, 0%, 100%, 21%
HSL 89.55°, 100%, 39.41%

Complementary Color


HEX #6100C9
RGB 97, 0, 201
CMYK 52%, 100%, 0%, 21%
HSL 268.96°, 100%, 39.41%

Complementary color scheme

#6100C9
#C90068
#C96100
#68C900
#00C961