The hex color #2b4d6c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D4B293. The grayscale version is
#4C4C4C. A 20% lighter version of the original color is
#5E809F, and Hex
#001A39 is the 20% darker color. If the color is saturated by 10%, you get
#284D6F. If the color is desaturated by 10%, the color
#2E4D69 is obtained.