The hex color #135c3c is a dark color. The web-safe version is Hex
#006633. A complementary color is
#ECA3C3. The grayscale version is
#393939. A 20% lighter version of the original color is
#468F6F, and Hex
#002909 is the 20% darker color. If the color is saturated by 10%, you get
#0F603C. If the color is desaturated by 10%, the color
#17593C is obtained.