The hex color #f99ef6 is a light color. The web-safe version is Hex
#FF99FF. A complementary color is
#066109. The grayscale version is
#DADADA. A 20% lighter version of the original color is
#FFD1FF, and Hex
#C66BC3 is the 20% darker color. If the color is saturated by 10%, you get
#FC98F9. If the color is desaturated by 10%, the color
#F6A4F3 is obtained.