The hex color #1f3fd2 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E0C02D. The grayscale version is
#656565. A 20% lighter version of the original color is
#5272FF, and Hex
#000C9F is the 20% darker color. If the color is saturated by 10%, you get
#183BDD. If the color is desaturated by 10%, the color
#2643C7 is obtained.