The hex color #1e66c2 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#E1993D. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#5199F5, and Hex
#00338F is the 20% darker color. If the color is saturated by 10%, you get
#1665CB. If the color is desaturated by 10%, the color
#2667B9 is obtained.