The hex color #b4e64d is a light color. The web-safe version is Hex
#CCFF66. A complementary color is
#4B19B2. The grayscale version is
#A2A2A2. A 20% lighter version of the original color is
#E7FF80, and Hex
#81B31A is the 20% darker color. If the color is saturated by 10%, you get
#B6ED44. If the color is desaturated by 10%, the color
#B2DF56 is obtained.