The hex color #4f658b is a dark color. The web-safe version is Hex
#666699. A complementary color is
#B09A74. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#8298BE, and Hex
#1C3258 is the 20% darker color. If the color is saturated by 10%, you get
#4C648E. If the color is desaturated by 10%, the color
#526688 is obtained.