The hex color #3d3d37 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2C2C8. The grayscale version is
#3B3B3B. A 20% lighter version of the original color is
#70706A, and Hex
#0A0A04 is the 20% darker color. If the color is saturated by 10%, you get
#3D3D37. If the color is desaturated by 10%, the color
#3D3D37 is obtained.