The hex color #1d1a3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E2E5C2. The grayscale version is
#272727. A 20% lighter version of the original color is
#504D70, and Hex
#00000A is the 20% darker color. If the color is saturated by 10%, you get
#1C193F. If the color is desaturated by 10%, the color
#1E1B3B is obtained.