The hex color #3f3e3f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C0C1C0. The grayscale version is
#3F3F3F. A 20% lighter version of the original color is
#727172, and Hex
#0C0B0C is the 20% darker color. If the color is saturated by 10%, you get
#3F3E3F. If the color is desaturated by 10%, the color
#3F3E3F is obtained.