The hex color #191e5c is a dark color. The web-safe version is Hex
#003366. A complementary color is
#E6E1A3. The grayscale version is
#313131. A 20% lighter version of the original color is
#4C518F, and Hex
#000029 is the 20% darker color. If the color is saturated by 10%, you get
#171C60. If the color is desaturated by 10%, the color
#1B2058 is obtained.