The hex color #a557e4 is a dark color. The web-safe version is Hex
#9966CC. A complementary color is
#5AA81B. The grayscale version is
#A0A0A0. A 20% lighter version of the original color is
#D88AFF, and Hex
#7224B1 is the 20% darker color. If the color is saturated by 10%, you get
#A650EB. If the color is desaturated by 10%, the color
#A55EDD is obtained.