The hex color #6d555c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#92AAA3. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#A0888F, and Hex
#3A2229 is the 20% darker color. If the color is saturated by 10%, you get
#6E545C. If the color is desaturated by 10%, the color
#6C565C is obtained.