The hex color #1a3d1f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5C2E0. The grayscale version is
#272727. A 20% lighter version of the original color is
#4D7052, and Hex
#000A00 is the 20% darker color. If the color is saturated by 10%, you get
#193F1E. If the color is desaturated by 10%, the color
#1B3B20 is obtained.