The hex color #2d2f3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D2D0C2. The grayscale version is
#333333. A 20% lighter version of the original color is
#606270, and Hex
#00000A is the 20% darker color. If the color is saturated by 10%, you get
#2C2F3E. If the color is desaturated by 10%, the color
#2E2F3C is obtained.