The hex color #fa2a2f is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#05D5D0. The grayscale version is
#717171. A 20% lighter version of the original color is
#FF5D62, and Hex
#C70000 is the 20% darker color. If the color is saturated by 10%, you get
#FF2328. If the color is desaturated by 10%, the color
#EC3136 is obtained.