The hex color #155e3a is a dark color. The web-safe version is Hex
#006633. A complementary color is
#EAA1C5. The grayscale version is
#3A3A3A. A 20% lighter version of the original color is
#48916D, and Hex
#002B07 is the 20% darker color. If the color is saturated by 10%, you get
#11623A. If the color is desaturated by 10%, the color
#195A3A is obtained.