The hex color #1a30a8 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#E5CF57. The grayscale version is
#515151. A 20% lighter version of the original color is
#4D63DB, and Hex
#000075 is the 20% darker color. If the color is saturated by 10%, you get
#152DB1. If the color is desaturated by 10%, the color
#1F339F is obtained.