The hex color #3b19e9 is a dark color. The web-safe version is Hex
#3300FF. A complementary color is
#C4E616. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#6E4CFF, and Hex
#0800B6 is the 20% darker color. If the color is saturated by 10%, you get
#3611F6. If the color is desaturated by 10%, the color
#4021DC is obtained.