The hex color #6f578c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#90A873. The grayscale version is
#717171. A 20% lighter version of the original color is
#A28ABF, and Hex
#3C2459 is the 20% darker color. If the color is saturated by 10%, you get
#6F548F. If the color is desaturated by 10%, the color
#6F5A89 is obtained.