The hex color #a31da7 is a dark color. The web-safe version is Hex
#993399. A complementary color is
#5CE258. The grayscale version is
#787878. A 20% lighter version of the original color is
#D650DA, and Hex
#700074 is the 20% darker color. If the color is saturated by 10%, you get
#A714AC. If the color is desaturated by 10%, the color
#9F26A2 is obtained.