The hex color #6c639c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#939C63. The grayscale version is
#797979. A 20% lighter version of the original color is
#9F96CF, and Hex
#393069 is the 20% darker color. If the color is saturated by 10%, you get
#6B61A0. If the color is desaturated by 10%, the color
#6D6599 is obtained.