The hex color #e82b2f is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#17D4D0. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#FF5E62, and Hex
#B50000 is the 20% darker color. If the color is saturated by 10%, you get
#F42529. If the color is desaturated by 10%, the color
#DC3135 is obtained.