The hex color #e73f5f is a dark color. The web-safe version is Hex
#FF3366. A complementary color is
#18C0A0. The grayscale version is
#828282. A 20% lighter version of the original color is
#FF7292, and Hex
#B40C2C is the 20% darker color. If the color is saturated by 10%, you get
#F1385C. If the color is desaturated by 10%, the color
#DD4662 is obtained.