The hex color #1a3b1f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5C4E0. The grayscale version is
#272727. A 20% lighter version of the original color is
#4D6E52, and Hex
#000800 is the 20% darker color. If the color is saturated by 10%, you get
#193D1E. If the color is desaturated by 10%, the color
#1B3920 is obtained.