The hex color #1e1bdd is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E1E422. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#514EFF, and Hex
#0000AA is the 20% darker color. If the color is saturated by 10%, you get
#1814EA. If the color is desaturated by 10%, the color
#2422D0 is obtained.