The hex color #0a0cdc is a dark color. The web-safe version is Hex
#0000CC. A complementary color is
#F5F323. The grayscale version is
#515151. A 20% lighter version of the original color is
#3D3FFF, and Hex
#0000A9 is the 20% darker color. If the color is saturated by 10%, you get
#0305EA. If the color is desaturated by 10%, the color
#1113CE is obtained.