The hex color #273b9c is a dark color. The web-safe version is Hex
#333399. A complementary color is
#D8C463. The grayscale version is
#555555. A 20% lighter version of the original color is
#5A6ECF, and Hex
#000869 is the 20% darker color. If the color is saturated by 10%, you get
#2238A3. If the color is desaturated by 10%, the color
#2C3E95 is obtained.