The hex color #1d3f2a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E2C0D5. The grayscale version is
#2D2D2D. A 20% lighter version of the original color is
#50725D, and Hex
#000C00 is the 20% darker color. If the color is saturated by 10%, you get
#1B412A. If the color is desaturated by 10%, the color
#1F3D2A is obtained.