The hex color #3f957f is a dark color. The web-safe version is Hex
#339966. A complementary color is
#C06A80. The grayscale version is
#717171. A 20% lighter version of the original color is
#72C8B2, and Hex
#0C624C is the 20% darker color. If the color is saturated by 10%, you get
#3A9980. If the color is desaturated by 10%, the color
#44917E is obtained.