The hex color #287e4d is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D781B2. The grayscale version is
#515151. A 20% lighter version of the original color is
#5BB180, and Hex
#004B1A is the 20% darker color. If the color is saturated by 10%, you get
#24834D. If the color is desaturated by 10%, the color
#2C7A4D is obtained.