The hex color #1a353f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5CAC0. The grayscale version is
#2F2F2F. A 20% lighter version of the original color is
#4D6872, and Hex
#00020C is the 20% darker color. If the color is saturated by 10%, you get
#183641. If the color is desaturated by 10%, the color
#1C343D is obtained.