The hex color #0a3ecc is a dark color. The web-safe version is Hex
#0033CC. A complementary color is
#F5C133. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#3D71FF, and Hex
#000B99 is the 20% darker color. If the color is saturated by 10%, you get
#023BD7. If the color is desaturated by 10%, the color
#1241C1 is obtained.