The hex color #2d28e2 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#D2D71D. The grayscale version is
#686868. A 20% lighter version of the original color is
#605BFF, and Hex
#0000AF is the 20% darker color. If the color is saturated by 10%, you get
#2722EE. If the color is desaturated by 10%, the color
#332ED6 is obtained.