The hex color #1c3d3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E3C2C2. The grayscale version is
#323232. A 20% lighter version of the original color is
#4F7070, and Hex
#000A0A is the 20% darker color. If the color is saturated by 10%, you get
#1A3E3E. If the color is desaturated by 10%, the color
#1E3C3C is obtained.