The hex color #3f0d37 is a dark color. The web-safe version is Hex
#330033. A complementary color is
#C0F2C8. The grayscale version is
#2C2C2C. A 20% lighter version of the original color is
#72406A, and Hex
#0C0004 is the 20% darker color. If the color is saturated by 10%, you get
#410A38. If the color is desaturated by 10%, the color
#3D1036 is obtained.