The hex color #e02a2f is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#1FD5D0. The grayscale version is
#686868. A 20% lighter version of the original color is
#FF5D62, and Hex
#AD0000 is the 20% darker color. If the color is saturated by 10%, you get
#EC2429. If the color is desaturated by 10%, the color
#D43035 is obtained.