The hex color #a8fc34 is a light color. The web-safe version is Hex
#99FF33. A complementary color is
#5703CB. The grayscale version is
#9D9D9D. A 20% lighter version of the original color is
#DBFF67, and Hex
#75C901 is the 20% darker color. If the color is saturated by 10%, you get
#A9FF29. If the color is desaturated by 10%, the color
#A7F33F is obtained.