The hex color #1f28f3 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E0D70C. The grayscale version is
#696969. A 20% lighter version of the original color is
#525BFF, and Hex
#0000C0 is the 20% darker color. If the color is saturated by 10%, you get
#1822FF. If the color is desaturated by 10%, the color
#262EE5 is obtained.