The hex color #0b3da5 is a dark color. The web-safe version is Hex
#003399. A complementary color is
#F4C25A. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#3E70D8, and Hex
#000A72 is the 20% darker color. If the color is saturated by 10%, you get
#043BAE. If the color is desaturated by 10%, the color
#123F9C is obtained.