The hex color #2f3a3c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D0C5C3. The grayscale version is
#373737. A 20% lighter version of the original color is
#626D6F, and Hex
#000709 is the 20% darker color. If the color is saturated by 10%, you get
#2E3A3D. If the color is desaturated by 10%, the color
#303A3C is obtained.