The hex color #c31dff is a dark color. The web-safe version is Hex
#CC33FF. A complementary color is
#3CE200. The grayscale version is
#A0A0A0. A 20% lighter version of the original color is
#F650FF, and Hex
#9000CC is the 20% darker color. If the color is saturated by 10%, you get
#C710FF. If the color is desaturated by 10%, the color
#BF2AF5 is obtained.