The hex color #a5ef4f is a light color. The web-safe version is Hex
#99FF66. A complementary color is
#5A10B0. The grayscale version is
#A1A1A1. A 20% lighter version of the original color is
#D8FF82, and Hex
#72BC1C is the 20% darker color. If the color is saturated by 10%, you get
#A5F747. If the color is desaturated by 10%, the color
#A5E757 is obtained.