The hex color #3fd3f3 is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#C02C0C. The grayscale version is
#ACACAC. A 20% lighter version of the original color is
#72FFFF, and Hex
#0CA0C0 is the 20% darker color. If the color is saturated by 10%, you get
#34D7FA. If the color is desaturated by 10%, the color
#4ACFEC is obtained.