The hex color #3d3b3b is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2C4C4. The grayscale version is
#3C3C3C. A 20% lighter version of the original color is
#706E6E, and Hex
#0A0808 is the 20% darker color. If the color is saturated by 10%, you get
#3D3B3B. If the color is desaturated by 10%, the color
#3D3B3B is obtained.