The hex color #6d667c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#929983. The grayscale version is
#707070. A 20% lighter version of the original color is
#A099AF, and Hex
#3A3349 is the 20% darker color. If the color is saturated by 10%, you get
#6D657D. If the color is desaturated by 10%, the color
#6D677B is obtained.