The hex color #3d49b6 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C2B649. The grayscale version is
#696969. A 20% lighter version of the original color is
#707CE9, and Hex
#0A1683 is the 20% darker color. If the color is saturated by 10%, you get
#3946BE. If the color is desaturated by 10%, the color
#414CAE is obtained.