The hex color #135e4c is a dark color. The web-safe version is Hex
#006633. A complementary color is
#ECA1B3. The grayscale version is
#3F3F3F. A 20% lighter version of the original color is
#46917F, and Hex
#002B19 is the 20% darker color. If the color is saturated by 10%, you get
#0F614D. If the color is desaturated by 10%, the color
#175B4B is obtained.