The hex color #2d4f3f is a dark color. The web-safe version is Hex
#336633. A complementary color is
#D2B0C0. The grayscale version is
#3E3E3E. A 20% lighter version of the original color is
#608272, and Hex
#001C0C is the 20% darker color. If the color is saturated by 10%, you get
#2B513F. If the color is desaturated by 10%, the color
#2F4D3F is obtained.