The hex color #0000dd is a dark color. The web-safe version is Hex
#0000CC. A complementary color is
#FFFF22. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#3333FF, and Hex
#0000AA is the 20% darker color. If the color is saturated by 10%, you get
#0000EC. If the color is desaturated by 10%, the color
#0707CE is obtained.