The hex color #3d1adb is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C2E524. The grayscale version is
#666666. A 20% lighter version of the original color is
#704DFF, and Hex
#0A00A8 is the 20% darker color. If the color is saturated by 10%, you get
#3912E7. If the color is desaturated by 10%, the color
#4122CF is obtained.