The hex color #1a3aa5 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#E5C55A. The grayscale version is
#535353. A 20% lighter version of the original color is
#4D6DD8, and Hex
#000772 is the 20% darker color. If the color is saturated by 10%, you get
#1438AD. If the color is desaturated by 10%, the color
#203D9D is obtained.