The hex color #100c84 is a dark color. The web-safe version is Hex
#000099. A complementary color is
#EFF37B. The grayscale version is
#353535. A 20% lighter version of the original color is
#433FB7, and Hex
#000051 is the 20% darker color. If the color is saturated by 10%, you get
#0C088C. If the color is desaturated by 10%, the color
#14107C is obtained.