The hex color #1a2e3d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5D1C2. The grayscale version is
#2C2C2C. A 20% lighter version of the original color is
#4D6170, and Hex
#00000A is the 20% darker color. If the color is saturated by 10%, you get
#182E3F. If the color is desaturated by 10%, the color
#1C2E3B is obtained.