The hex color #4f99a2 is a light color. The web-safe version is Hex
#669999. A complementary color is
#B0665D. The grayscale version is
#838383. A 20% lighter version of the original color is
#82CCD5, and Hex
#1C666F is the 20% darker color. If the color is saturated by 10%, you get
#4A9BA5. If the color is desaturated by 10%, the color
#54979F is obtained.