The hex color #1c2d3c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E3D2C3. The grayscale version is
#2C2C2C. A 20% lighter version of the original color is
#4F606F, and Hex
#000009 is the 20% darker color. If the color is saturated by 10%, you get
#1A2D3E. If the color is desaturated by 10%, the color
#1E2D3A is obtained.