The hex color #a9c42a is a light color. The web-safe version is Hex
#99CC33. A complementary color is
#563BD5. The grayscale version is
#888888. A 20% lighter version of the original color is
#DCF75D, and Hex
#769100 is the 20% darker color. If the color is saturated by 10%, you get
#ACCA21. If the color is desaturated by 10%, the color
#A6BE33 is obtained.