The hex color #371d1b is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C8E2E4. The grayscale version is
#252525. A 20% lighter version of the original color is
#6A504E, and Hex
#040000 is the 20% darker color. If the color is saturated by 10%, you get
#391C1A. If the color is desaturated by 10%, the color
#351E1C is obtained.