The hex color #2d28f6 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#D2D709. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#605BFF, and Hex
#0000C3 is the 20% darker color. If the color is saturated by 10%, you get
#2621FF. If the color is desaturated by 10%, the color
#342FE8 is obtained.