The hex color #1d28a2 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#E2D75D. The grayscale version is
#4D4D4D. A 20% lighter version of the original color is
#505BD5, and Hex
#00006F is the 20% darker color. If the color is saturated by 10%, you get
#1824AB. If the color is desaturated by 10%, the color
#222C9A is obtained.