The hex color #a100d3 is a dark color. The web-safe version is Hex
#9900CC. A complementary color is
#5EFF2C. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#D433FF, and Hex
#6E00A0 is the 20% darker color. If the color is saturated by 10%, you get
#A500DC. If the color is desaturated by 10%, the color
#9D0CCA is obtained.