The hex color #3f47d4 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C0B82B. The grayscale version is
#737373. A 20% lighter version of the original color is
#727AFF, and Hex
#0C14A1 is the 20% darker color. If the color is saturated by 10%, you get
#3A43DE. If the color is desaturated by 10%, the color
#444BCA is obtained.