The hex color #1e66d3 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#E1992C. The grayscale version is
#727272. A 20% lighter version of the original color is
#5199FF, and Hex
#0033A0 is the 20% darker color. If the color is saturated by 10%, you get
#1665DD. If the color is desaturated by 10%, the color
#2667C9 is obtained.