The hex color #3a28e4 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C5D71B. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#6D5BFF, and Hex
#0700B1 is the 20% darker color. If the color is saturated by 10%, you get
#3521F0. If the color is desaturated by 10%, the color
#3F2FD8 is obtained.