The hex color #a664cf is a light color. The web-safe version is Hex
#9966CC. A complementary color is
#599B30. The grayscale version is
#9E9E9E. A 20% lighter version of the original color is
#D997FF, and Hex
#73319C is the 20% darker color. If the color is saturated by 10%, you get
#A75ED4. If the color is desaturated by 10%, the color
#A56ACA is obtained.