The hex color #3f1eb8 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C0E147. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#7251EB, and Hex
#0C0085 is the 20% darker color. If the color is saturated by 10%, you get
#3C18C1. If the color is desaturated by 10%, the color
#4224AF is obtained.