The hex color #a66df1 is a light color. The web-safe version is Hex
#9966FF. A complementary color is
#59920E. The grayscale version is
#ACACAC. A 20% lighter version of the original color is
#D9A0FF, and Hex
#733ABE is the 20% darker color. If the color is saturated by 10%, you get
#A567F8. If the color is desaturated by 10%, the color
#A773EA is obtained.