The hex color #4f788f is a dark color. The web-safe version is Hex
#666699. A complementary color is
#B08770. The grayscale version is
#727272. A 20% lighter version of the original color is
#82ABC2, and Hex
#1C455C is the 20% darker color. If the color is saturated by 10%, you get
#4C7992. If the color is desaturated by 10%, the color
#53778C is obtained.