The hex color #8a51a2 is a dark color. The web-safe version is Hex
#996699. A complementary color is
#75AE5D. The grayscale version is
#7F7F7F. A 20% lighter version of the original color is
#BD84D5, and Hex
#571E6F is the 20% darker color. If the color is saturated by 10%, you get
#8B4CA6. If the color is desaturated by 10%, the color
#89569F is obtained.