The hex color #18427c is a dark color. The web-safe version is Hex
#003366. A complementary color is
#E7BD83. The grayscale version is
#474747. A 20% lighter version of the original color is
#4B75AF, and Hex
#000F49 is the 20% darker color. If the color is saturated by 10%, you get
#134181. If the color is desaturated by 10%, the color
#1D4377 is obtained.