The hex color #2a3b3a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D5C4C5. The grayscale version is
#353535. A 20% lighter version of the original color is
#5D6E6D, and Hex
#000807 is the 20% darker color. If the color is saturated by 10%, you get
#293C3B. If the color is desaturated by 10%, the color
#2B3A3A is obtained.