The hex color #3428f1 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#CBD70E. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#675BFF, and Hex
#0100BE is the 20% darker color. If the color is saturated by 10%, you get
#2E21FE. If the color is desaturated by 10%, the color
#3A2FE4 is obtained.