The hex color #b9f18d is a light color. The web-safe version is Hex
#CCFF99. A complementary color is
#460E72. The grayscale version is
#BDBDBD. A 20% lighter version of the original color is
#ECFFC0, and Hex
#86BE5A is the 20% darker color. If the color is saturated by 10%, you get
#B9F688. If the color is desaturated by 10%, the color
#B9EC92 is obtained.