The hex color #2f3f3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D0C0C2. The grayscale version is
#393939. A 20% lighter version of the original color is
#627270, and Hex
#000C0A is the 20% darker color. If the color is saturated by 10%, you get
#2E403D. If the color is desaturated by 10%, the color
#303E3D is obtained.