The hex color #3d3c3c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2C3C3. The grayscale version is
#3C3C3C. A 20% lighter version of the original color is
#706F6F, and Hex
#0A0909 is the 20% darker color. If the color is saturated by 10%, you get
#3D3C3C. If the color is desaturated by 10%, the color
#3D3C3C is obtained.