The hex color #a504d9 is a dark color. The web-safe version is Hex
#9900CC. A complementary color is
#5AFB26. The grayscale version is
#818181. A 20% lighter version of the original color is
#D837FF, and Hex
#7200A6 is the 20% darker color. If the color is saturated by 10%, you get
#A900E2. If the color is desaturated by 10%, the color
#A110D0 is obtained.