The hex color #724ddc is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#8DB223. The grayscale version is
#898989. A 20% lighter version of the original color is
#A580FF, and Hex
#3F1AA9 is the 20% darker color. If the color is saturated by 10%, you get
#7047E4. If the color is desaturated by 10%, the color
#7453D4 is obtained.