The hex color #e01b0b is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#1FE4F4. The grayscale version is
#575757. A 20% lighter version of the original color is
#FF4E3E, and Hex
#AD0000 is the 20% darker color. If the color is saturated by 10%, you get
#EE1503. If the color is desaturated by 10%, the color
#D22113 is obtained.