The hex color #a9b31d is a light color. The web-safe version is Hex
#99CC33. A complementary color is
#564CE2. The grayscale version is
#7E7E7E. A 20% lighter version of the original color is
#DCE650, and Hex
#768000 is the 20% darker color. If the color is saturated by 10%, you get
#ADB813. If the color is desaturated by 10%, the color
#A5AE27 is obtained.