The hex color #2c3d3a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D3C2C5. The grayscale version is
#363636. A 20% lighter version of the original color is
#5F706D, and Hex
#000A07 is the 20% darker color. If the color is saturated by 10%, you get
#2B3E3A. If the color is desaturated by 10%, the color
#2D3C3A is obtained.