The hex color #3a3a3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C5C5C2. The grayscale version is
#3B3B3B. A 20% lighter version of the original color is
#6D6D70, and Hex
#07070A is the 20% darker color. If the color is saturated by 10%, you get
#3A3A3D. If the color is desaturated by 10%, the color
#3A3A3D is obtained.