The hex color #4971b5 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#B68E4A. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#7CA4E8, and Hex
#163E82 is the 20% darker color. If the color is saturated by 10%, you get
#4470BB. If the color is desaturated by 10%, the color
#4E72AF is obtained.