The hex color #f81c5f is a dark color. The web-safe version is Hex
#FF3366. A complementary color is
#07E3A0. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#FF4F92, and Hex
#C5002C is the 20% darker color. If the color is saturated by 10%, you get
#FF125C. If the color is desaturated by 10%, the color
#EC2662 is obtained.