The hex color #1b3b31 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E4C4CE. The grayscale version is
#2D2D2D. A 20% lighter version of the original color is
#4E6E64, and Hex
#000800 is the 20% darker color. If the color is saturated by 10%, you get
#193C31. If the color is desaturated by 10%, the color
#1D3A31 is obtained.