The hex color #1f3d58 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E0C2A7. The grayscale version is
#3C3C3C. A 20% lighter version of the original color is
#52708B, and Hex
#000A25 is the 20% darker color. If the color is saturated by 10%, you get
#1C3D5B. If the color is desaturated by 10%, the color
#223D55 is obtained.