The hex color #3f47fb is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#C0B804. The grayscale version is
#808080. A 20% lighter version of the original color is
#727AFF, and Hex
#0C14C8 is the 20% darker color. If the color is saturated by 10%, you get
#3841FF. If the color is desaturated by 10%, the color
#464DEF is obtained.