The hex color #3f343d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C0CBC2. The grayscale version is
#3B3B3B. A 20% lighter version of the original color is
#726770, and Hex
#0C010A is the 20% darker color. If the color is saturated by 10%, you get
#3F333D. If the color is desaturated by 10%, the color
#3F353D is obtained.