The hex color #b4e43d is a light color. The web-safe version is Hex
#CCCC33. A complementary color is
#4B1BC2. The grayscale version is
#9C9C9C. A 20% lighter version of the original color is
#E7FF70, and Hex
#81B10A is the 20% darker color. If the color is saturated by 10%, you get
#B6EB33. If the color is desaturated by 10%, the color
#B2DD47 is obtained.