The hex color #2b28d3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#D4D72C. The grayscale version is
#626262. A 20% lighter version of the original color is
#5E5BFF, and Hex
#0000A0 is the 20% darker color. If the color is saturated by 10%, you get
#2622DE. If the color is desaturated by 10%, the color
#312EC8 is obtained.