The hex color #a8b900 is a light color. The web-safe version is Hex
#99CC00. A complementary color is
#5746FF. The grayscale version is
#767676. A 20% lighter version of the original color is
#DBEC33, and Hex
#758600 is the 20% darker color. If the color is saturated by 10%, you get
#ADC000. If the color is desaturated by 10%, the color
#A3B20C is obtained.