The hex color #a9e56a is a light color. The web-safe version is Hex
#99CC66. A complementary color is
#561A95. The grayscale version is
#A8A8A8. A 20% lighter version of the original color is
#DCFF9D, and Hex
#76B237 is the 20% darker color. If the color is saturated by 10%, you get
#A9EB64. If the color is desaturated by 10%, the color
#A9DF70 is obtained.