The hex color #634f9c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#9CB063. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#9682CF, and Hex
#301C69 is the 20% darker color. If the color is saturated by 10%, you get
#624CA0. If the color is desaturated by 10%, the color
#645298 is obtained.