The hex color #a556cd is a dark color. The web-safe version is Hex
#9966CC. A complementary color is
#5AA932. The grayscale version is
#989898. A 20% lighter version of the original color is
#D889FF, and Hex
#72239A is the 20% darker color. If the color is saturated by 10%, you get
#A64FD2. If the color is desaturated by 10%, the color
#A45DC8 is obtained.