The hex color #1f366d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E0C992. The grayscale version is
#414141. A 20% lighter version of the original color is
#5269A0, and Hex
#00033A is the 20% darker color. If the color is saturated by 10%, you get
#1C3571. If the color is desaturated by 10%, the color
#223769 is obtained.