The hex color #2f56a3 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#D0A95C. The grayscale version is
#636363. A 20% lighter version of the original color is
#6289D6, and Hex
#002370 is the 20% darker color. If the color is saturated by 10%, you get
#2A55A9. If the color is desaturated by 10%, the color
#34579D is obtained.