The hex color #660c8c is a dark color. The web-safe version is Hex
#660099. A complementary color is
#99F373. The grayscale version is
#555555. A 20% lighter version of the original color is
#993FBF, and Hex
#330059 is the 20% darker color. If the color is saturated by 10%, you get
#680592. If the color is desaturated by 10%, the color
#641386 is obtained.