The hex color #2d28d0 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#D2D72F. The grayscale version is
#626262. A 20% lighter version of the original color is
#605BFF, and Hex
#00009D is the 20% darker color. If the color is saturated by 10%, you get
#2822DB. If the color is desaturated by 10%, the color
#322EC5 is obtained.