The hex color #1d42f3 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E2BD0C. The grayscale version is
#717171. A 20% lighter version of the original color is
#5075FF, and Hex
#000FC0 is the 20% darker color. If the color is saturated by 10%, you get
#153DFF. If the color is desaturated by 10%, the color
#2547E6 is obtained.