The hex color #2d3b3a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D2C4C5. The grayscale version is
#363636. A 20% lighter version of the original color is
#606E6D, and Hex
#000807 is the 20% darker color. If the color is saturated by 10%, you get
#2C3C3A. If the color is desaturated by 10%, the color
#2E3B3A is obtained.