The hex color #0000fa is a dark color. The web-safe version is Hex
#0000FF. A complementary color is
#FFFF05. The grayscale version is
#535353. A 20% lighter version of the original color is
#3333FF, and Hex
#0000C7 is the 20% darker color. If the color is saturated by 10%, you get
#0000FF. If the color is desaturated by 10%, the color
#0808E9 is obtained.