The hex color #3fcbf9 is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#C03406. The grayscale version is
#ACACAC. A 20% lighter version of the original color is
#72FEFF, and Hex
#0C98C6 is the 20% darker color. If the color is saturated by 10%, you get
#34CEFF. If the color is desaturated by 10%, the color
#4AC8F1 is obtained.