The hex color #231c1f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#DCE3E0. The grayscale version is
#1F1F1F. A 20% lighter version of the original color is
#564F52, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#231C1F. If the color is desaturated by 10%, the color
#231C1F is obtained.