The hex color #3c3f42 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C3C0BD. The grayscale version is
#3F3F3F. A 20% lighter version of the original color is
#6F7275, and Hex
#090C0F is the 20% darker color. If the color is saturated by 10%, you get
#3C3F42. If the color is desaturated by 10%, the color
#3C3F42 is obtained.