The hex color #0f43d0 is a dark color. The web-safe version is Hex
#0033CC. A complementary color is
#F0BC2F. The grayscale version is
#616161. A 20% lighter version of the original color is
#4276FF, and Hex
#00109D is the 20% darker color. If the color is saturated by 10%, you get
#0740DB. If the color is desaturated by 10%, the color
#1746C5 is obtained.