The hex color #1a3e2d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5C1D2. The grayscale version is
#2C2C2C. A 20% lighter version of the original color is
#4D7160, and Hex
#000B00 is the 20% darker color. If the color is saturated by 10%, you get
#18402D. If the color is desaturated by 10%, the color
#1C3C2D is obtained.