The hex color #1d284c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E2D7B3. The grayscale version is
#303030. A 20% lighter version of the original color is
#505B7F, and Hex
#000019 is the 20% darker color. If the color is saturated by 10%, you get
#1B274F. If the color is desaturated by 10%, the color
#1F2949 is obtained.