The hex color #4f99b6 is a light color. The web-safe version is Hex
#6699CC. A complementary color is
#B06649. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#82CCE9, and Hex
#1C6683 is the 20% darker color. If the color is saturated by 10%, you get
#499BBA. If the color is desaturated by 10%, the color
#5598B2 is obtained.