The hex color #6b4ebc is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#94B143. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#9E81EF, and Hex
#381B89 is the 20% darker color. If the color is saturated by 10%, you get
#6949C2. If the color is desaturated by 10%, the color
#6D53B6 is obtained.