The hex color #3fb8f8 is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#C04707. The grayscale version is
#A5A5A5. A 20% lighter version of the original color is
#72EBFF, and Hex
#0C85C5 is the 20% darker color. If the color is saturated by 10%, you get
#35BAFF. If the color is desaturated by 10%, the color
#49B6F0 is obtained.