The hex color #f99fff is a light color. The web-safe version is Hex
#FF99FF. A complementary color is
#066000. The grayscale version is
#DDDDDD. A 20% lighter version of the original color is
#FFD2FF, and Hex
#C66CCC is the 20% darker color. If the color is saturated by 10%, you get
#FC99FF. If the color is desaturated by 10%, the color
#F6A5FC is obtained.