The hex color #171b4c is a dark color. The web-safe version is Hex
#003333. A complementary color is
#E8E4B3. The grayscale version is
#2A2A2A. A 20% lighter version of the original color is
#4A4E7F, and Hex
#000019 is the 20% darker color. If the color is saturated by 10%, you get
#151A4F. If the color is desaturated by 10%, the color
#191D49 is obtained.