The hex color #3e3de9 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#C1C216. The grayscale version is
#777777. A 20% lighter version of the original color is
#7170FF, and Hex
#0B0AB6 is the 20% darker color. If the color is saturated by 10%, you get
#3837F4. If the color is desaturated by 10%, the color
#4443DE is obtained.