The hex color #3fa88f is a light color. The web-safe version is Hex
#339999. A complementary color is
#C05770. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#72DBC2, and Hex
#0C755C is the 20% darker color. If the color is saturated by 10%, you get
#39AC91. If the color is desaturated by 10%, the color
#45A48D is obtained.