The hex color #1a405c is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E5BFA3. The grayscale version is
#3D3D3D. A 20% lighter version of the original color is
#4D738F, and Hex
#000D29 is the 20% darker color. If the color is saturated by 10%, you get
#17405F. If the color is desaturated by 10%, the color
#1D4059 is obtained.