The hex color #a4a000 is a light color. The web-safe version is Hex
#999900. A complementary color is
#5B5FFF. The grayscale version is
#6C6C6C. A 20% lighter version of the original color is
#D7D333, and Hex
#716D00 is the 20% darker color. If the color is saturated by 10%, you get
#AAA500. If the color is desaturated by 10%, the color
#9E9B0B is obtained.