The hex color #1751a7 is a dark color. The web-safe version is Hex
#006699. A complementary color is
#E8AE58. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#4A84DA, and Hex
#001E74 is the 20% darker color. If the color is saturated by 10%, you get
#1050AF. If the color is desaturated by 10%, the color
#1E529F is obtained.