The hex color #6b3a9a is a dark color. The web-safe version is Hex
#663399. A complementary color is
#94C565. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#9E6DCD, and Hex
#380767 is the 20% darker color. If the color is saturated by 10%, you get
#6B359F. If the color is desaturated by 10%, the color
#6B3F95 is obtained.