The hex color #4f657c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#B09A83. The grayscale version is
#656565. A 20% lighter version of the original color is
#8298AF, and Hex
#1C3249 is the 20% darker color. If the color is saturated by 10%, you get
#4D657E. If the color is desaturated by 10%, the color
#51657A is obtained.