The hex color #b9f34e is a light color. The web-safe version is Hex
#CCFF66. A complementary color is
#460CB1. The grayscale version is
#A9A9A9. A 20% lighter version of the original color is
#ECFF81, and Hex
#86C01B is the 20% darker color. If the color is saturated by 10%, you get
#BBFA45. If the color is desaturated by 10%, the color
#B7EC57 is obtained.