The hex color #a4b31d is a light color. The web-safe version is Hex
#99CC33. A complementary color is
#5B4CE2. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#D7E650, and Hex
#718000 is the 20% darker color. If the color is saturated by 10%, you get
#A8B914. If the color is desaturated by 10%, the color
#A0AE27 is obtained.