The hex color #2d3f21 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D2C0DE. The grayscale version is
#2F2F2F. A 20% lighter version of the original color is
#607254, and Hex
#000C00 is the 20% darker color. If the color is saturated by 10%, you get
#2D4120. If the color is desaturated by 10%, the color
#2D3D22 is obtained.