The hex color #3d1f5f is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C2E0A0. The grayscale version is
#3E3E3E. A 20% lighter version of the original color is
#705292, and Hex
#0A002C is the 20% darker color. If the color is saturated by 10%, you get
#3D1C62. If the color is desaturated by 10%, the color
#3D225C is obtained.