The hex color #2428dd is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#DBD722. The grayscale version is
#636363. A 20% lighter version of the original color is
#575BFF, and Hex
#0000AA is the 20% darker color. If the color is saturated by 10%, you get
#1E22E9. If the color is desaturated by 10%, the color
#2A2ED1 is obtained.