The hex color #1a28d2 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E5D72D. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#4D5BFF, and Hex
#00009F is the 20% darker color. If the color is saturated by 10%, you get
#1323DE. If the color is desaturated by 10%, the color
#212DC6 is obtained.