The hex color #6b559c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#94AA63. The grayscale version is
#747474. A 20% lighter version of the original color is
#9E88CF, and Hex
#382269 is the 20% darker color. If the color is saturated by 10%, you get
#6A52A0. If the color is desaturated by 10%, the color
#6C5898 is obtained.