The hex color #546f5c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#AB90A3. The grayscale version is
#606060. A 20% lighter version of the original color is
#87A28F, and Hex
#213C29 is the 20% darker color. If the color is saturated by 10%, you get
#53715C. If the color is desaturated by 10%, the color
#556D5C is obtained.