The hex color #5a6a7c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#A59583. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#8D9DAF, and Hex
#273749 is the 20% darker color. If the color is saturated by 10%, you get
#586A7E. If the color is desaturated by 10%, the color
#5C6A7A is obtained.