The hex color #3e3f2f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C1C0D0. The grayscale version is
#393939. A 20% lighter version of the original color is
#717262, and Hex
#0B0C00 is the 20% darker color. If the color is saturated by 10%, you get
#3E402E. If the color is desaturated by 10%, the color
#3E3E30 is obtained.