The hex color #28e4fb is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#D71B04. The grayscale version is
#ADADAD. A 20% lighter version of the original color is
#5BFFFF, and Hex
#00B1C8 is the 20% darker color. If the color is saturated by 10%, you get
#1BEAFF. If the color is desaturated by 10%, the color
#35DFF3 is obtained.