The hex color #1f28e0 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E0D71F. The grayscale version is
#626262. A 20% lighter version of the original color is
#525BFF, and Hex
#0000AD is the 20% darker color. If the color is saturated by 10%, you get
#1822ED. If the color is desaturated by 10%, the color
#262ED3 is obtained.