The hex color #3e47b7 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C1B848. The grayscale version is
#696969. A 20% lighter version of the original color is
#717AEA, and Hex
#0B1484 is the 20% darker color. If the color is saturated by 10%, you get
#3A44BF. If the color is desaturated by 10%, the color
#424AAF is obtained.