The hex color #b9dd5f is a light color. The web-safe version is Hex
#CCCC66. A complementary color is
#4622A0. The grayscale version is
#A7A7A7. A 20% lighter version of the original color is
#ECFF92, and Hex
#86AA2C is the 20% darker color. If the color is saturated by 10%, you get
#BBE258. If the color is desaturated by 10%, the color
#B7D866 is obtained.