The hex color #3E3DA2 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C1C25D. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#7170D5, and Hex
#0B0A6F is the 20% darker color. If the color is saturated by 10%, you get
#3B3AA9. If the color is desaturated by 10%, the color
#41409B is obtained.