The hex color #0f3cc3 is a dark color. The web-safe version is Hex
#0033CC. A complementary color is
#F0C33C. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#426FF6, and Hex
#000990 is the 20% darker color. If the color is saturated by 10%, you get
#0839CE. If the color is desaturated by 10%, the color
#173FB9 is obtained.