The hex color #a9f64e is a light color. The web-safe version is Hex
#99FF66. A complementary color is
#5609B1. The grayscale version is
#A4A4A4. A 20% lighter version of the original color is
#DCFF81, and Hex
#76C31B is the 20% darker color. If the color is saturated by 10%, you get
#A9FE45. If the color is desaturated by 10%, the color
#A9EE57 is obtained.