The hex color #2d28d3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#D2D72C. The grayscale version is
#636363. A 20% lighter version of the original color is
#605BFF, and Hex
#0000A0 is the 20% darker color. If the color is saturated by 10%, you get
#2822DE. If the color is desaturated by 10%, the color
#322EC8 is obtained.