The hex color #a66dfb is a light color. The web-safe version is Hex
#9966FF. A complementary color is
#599204. The grayscale version is
#AFAFAF. A 20% lighter version of the original color is
#D9A0FF, and Hex
#733AC8 is the 20% darker color. If the color is saturated by 10%, you get
#A566FF. If the color is desaturated by 10%, the color
#A774F3 is obtained.