The hex color #3428d3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#CBD72C. The grayscale version is
#656565. A 20% lighter version of the original color is
#675BFF, and Hex
#0100A0 is the 20% darker color. If the color is saturated by 10%, you get
#2F22DE. If the color is desaturated by 10%, the color
#392EC8 is obtained.