The hex color #a821e9 is a dark color. The web-safe version is Hex
#9933FF. A complementary color is
#57DE16. The grayscale version is
#919191. A 20% lighter version of the original color is
#DB54FF, and Hex
#7500B6 is the 20% darker color. If the color is saturated by 10%, you get
#AA16F2. If the color is desaturated by 10%, the color
#A62CE0 is obtained.