The hex color #1d1aa3 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#E2E55C. The grayscale version is
#494949. A 20% lighter version of the original color is
#504DD6, and Hex
#000070 is the 20% darker color. If the color is saturated by 10%, you get
#1915AC. If the color is desaturated by 10%, the color
#211F9A is obtained.