The hex color #a5f20a is a light color. The web-safe version is Hex
#99FF00. A complementary color is
#5A0DF5. The grayscale version is
#8B8B8B. A 20% lighter version of the original color is
#D8FF3D, and Hex
#72BF00 is the 20% darker color. If the color is saturated by 10%, you get
#A8FC00. If the color is desaturated by 10%, the color
#A2E817 is obtained.