The hex color #1a434f is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E5BCB0. The grayscale version is
#393939. A 20% lighter version of the original color is
#4D7682, and Hex
#00101C is the 20% darker color. If the color is saturated by 10%, you get
#174451. If the color is desaturated by 10%, the color
#1D424D is obtained.