The hex color #6a668c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#959973. The grayscale version is
#747474. A 20% lighter version of the original color is
#9D99BF, and Hex
#373359 is the 20% darker color. If the color is saturated by 10%, you get
#69658E. If the color is desaturated by 10%, the color
#6B678A is obtained.