The hex color #511cdf is a dark color. The web-safe version is Hex
#6633CC. A complementary color is
#AEE320. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#844FFF, and Hex
#1E00AC is the 20% darker color. If the color is saturated by 10%, you get
#4E14EA. If the color is desaturated by 10%, the color
#5424D4 is obtained.