The hex color #3fd6da is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C02925. The grayscale version is
#A5A5A5. A 20% lighter version of the original color is
#72FFFF, and Hex
#0CA3A7 is the 20% darker color. If the color is saturated by 10%, you get
#35DBDF. If the color is desaturated by 10%, the color
#49D1D5 is obtained.