The hex color #b83d4b is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#47C2B4. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#EB707E, and Hex
#850A18 is the 20% darker color. If the color is saturated by 10%, you get
#C03848. If the color is desaturated by 10%, the color
#B0424E is obtained.