The hex color #3d1a3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2E5C2. The grayscale version is
#313131. A 20% lighter version of the original color is
#704D70, and Hex
#0A000A is the 20% darker color. If the color is saturated by 10%, you get
#3E183E. If the color is desaturated by 10%, the color
#3C1C3C is obtained.