The hex color #6b188c is a dark color. The web-safe version is Hex
#660099. A complementary color is
#94E773. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#9E4BBF, and Hex
#380059 is the 20% darker color. If the color is saturated by 10%, you get
#6D1191. If the color is desaturated by 10%, the color
#691F87 is obtained.