The hex color #1d2a3b is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E2D5C4. The grayscale version is
#2B2B2B. A 20% lighter version of the original color is
#505D6E, and Hex
#000008 is the 20% darker color. If the color is saturated by 10%, you get
#1C2A3D. If the color is desaturated by 10%, the color
#1E2A39 is obtained.