The hex color #3f2e5e is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C0D1A1. The grayscale version is
#444444. A 20% lighter version of the original color is
#726191, and Hex
#0C002B is the 20% darker color. If the color is saturated by 10%, you get
#3F2C61. If the color is desaturated by 10%, the color
#3F305B is obtained.