The hex color #222d4c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#DDD2B3. The grayscale version is
#343434. A 20% lighter version of the original color is
#55607F, and Hex
#000019 is the 20% darker color. If the color is saturated by 10%, you get
#202C4E. If the color is desaturated by 10%, the color
#242E4A is obtained.