The hex color #631d4c is a dark color. The web-safe version is Hex
#663333. A complementary color is
#9CE2B3. The grayscale version is
#444444. A 20% lighter version of the original color is
#96507F, and Hex
#300019 is the 20% darker color. If the color is saturated by 10%, you get
#66194D. If the color is desaturated by 10%, the color
#60214B is obtained.