The hex color #121a4c is a dark color. The web-safe version is Hex
#003333. A complementary color is
#EDE5B3. The grayscale version is
#282828. A 20% lighter version of the original color is
#454D7F, and Hex
#000019 is the 20% darker color. If the color is saturated by 10%, you get
#101950. If the color is desaturated by 10%, the color
#141B48 is obtained.