The hex color #ea103f is a dark color. The web-safe version is Hex
#FF0033. A complementary color is
#15EFC0. The grayscale version is
#686868. A 20% lighter version of the original color is
#FF4372, and Hex
#B7000C is the 20% darker color. If the color is saturated by 10%, you get
#F7073B. If the color is desaturated by 10%, the color
#DD1943 is obtained.