The hex color #1e66b3 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#E1994C. The grayscale version is
#686868. A 20% lighter version of the original color is
#5199E6, and Hex
#003380 is the 20% darker color. If the color is saturated by 10%, you get
#1766BB. If the color is desaturated by 10%, the color
#2566AB is obtained.