The hex color #3e3da9 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C1C256. The grayscale version is
#616161. A 20% lighter version of the original color is
#7170DC, and Hex
#0B0A76 is the 20% darker color. If the color is saturated by 10%, you get
#3A39B0. If the color is desaturated by 10%, the color
#4241A2 is obtained.