The hex color #f15c5e is a light color. The web-safe version is Hex
#FF6666. A complementary color is
#0EA3A1. The grayscale version is
#8E8E8E. A 20% lighter version of the original color is
#FF8F91, and Hex
#BE292B is the 20% darker color. If the color is saturated by 10%, you get
#FB5759. If the color is desaturated by 10%, the color
#E76163 is obtained.