The hex color #65419c is a dark color. The web-safe version is Hex
#663399. A complementary color is
#9ABE63. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#9874CF, and Hex
#320E69 is the 20% darker color. If the color is saturated by 10%, you get
#643DA1. If the color is desaturated by 10%, the color
#664597 is obtained.