The hex color #1a3b2c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5C4D3. The grayscale version is
#2B2B2B. A 20% lighter version of the original color is
#4D6E5F, and Hex
#000800 is the 20% darker color. If the color is saturated by 10%, you get
#183D2C. If the color is desaturated by 10%, the color
#1C392C is obtained.