The hex color #57209c is a dark color. The web-safe version is Hex
#663399. A complementary color is
#A8DF63. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#8A53CF, and Hex
#240069 is the 20% darker color. If the color is saturated by 10%, you get
#571AA2. If the color is desaturated by 10%, the color
#572696 is obtained.