The hex color #3f0d3f is a dark color. The web-safe version is Hex
#330033. A complementary color is
#C0F2C0. The grayscale version is
#2E2E2E. A 20% lighter version of the original color is
#724072, and Hex
#0C000C is the 20% darker color. If the color is saturated by 10%, you get
#410A41. If the color is desaturated by 10%, the color
#3D103D is obtained.