The hex color #19577c is a dark color. The web-safe version is Hex
#006666. A complementary color is
#E6A883. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#4C8AAF, and Hex
#002449 is the 20% darker color. If the color is saturated by 10%, you get
#145881. If the color is desaturated by 10%, the color
#1E5677 is obtained.