The hex color #1d2d6f is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E2D290. The grayscale version is
#3E3E3E. A 20% lighter version of the original color is
#5060A2, and Hex
#00003C is the 20% darker color. If the color is saturated by 10%, you get
#1A2B74. If the color is desaturated by 10%, the color
#202F6A is obtained.