The hex color #1e16e3 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#E1E91C. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#5149FF, and Hex
#0000B0 is the 20% darker color. If the color is saturated by 10%, you get
#180FF0. If the color is desaturated by 10%, the color
#241DD6 is obtained.