The hex color #743f7f is a dark color. The web-safe version is Hex
#663366. A complementary color is
#8BC080. The grayscale version is
#666666. A 20% lighter version of the original color is
#A772B2, and Hex
#410C4C is the 20% darker color. If the color is saturated by 10%, you get
#753B82. If the color is desaturated by 10%, the color
#73437D is obtained.