The hex color #0a345c is a dark color. The web-safe version is Hex
#003366. A complementary color is
#F5CBA3. The grayscale version is
#333333. A 20% lighter version of the original color is
#3D678F, and Hex
#000129 is the 20% darker color. If the color is saturated by 10%, you get
#063460. If the color is desaturated by 10%, the color
#0E3458 is obtained.