The hex color #c4f23b is a light color. The web-safe version is Hex
#CCFF33. A complementary color is
#3B0DC4. The grayscale version is
#A6A6A6. A 20% lighter version of the original color is
#F7FF6E, and Hex
#91BF08 is the 20% darker color. If the color is saturated by 10%, you get
#C7FA30. If the color is desaturated by 10%, the color
#C1EA46 is obtained.