The hex color #2a3d3e is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D5C2C1. The grayscale version is
#373737. A 20% lighter version of the original color is
#5D7071, and Hex
#000A0B is the 20% darker color. If the color is saturated by 10%, you get
#293E3F. If the color is desaturated by 10%, the color
#2B3C3D is obtained.