The hex color #3a8a8f is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C57570. The grayscale version is
#717171. A 20% lighter version of the original color is
#6DBDC2, and Hex
#07575C is the 20% darker color. If the color is saturated by 10%, you get
#358D92. If the color is desaturated by 10%, the color
#40888C is obtained.