The hex color #51208c is a dark color. The web-safe version is Hex
#663399. A complementary color is
#AEDF73. The grayscale version is
#545454. A 20% lighter version of the original color is
#8453BF, and Hex
#1E0059 is the 20% darker color. If the color is saturated by 10%, you get
#511B92. If the color is desaturated by 10%, the color
#512586 is obtained.