The hex color #ab3d3b is a dark color. The web-safe version is Hex
#993333. A complementary color is
#54C2C4. The grayscale version is
#616161. A 20% lighter version of the original color is
#DE706E, and Hex
#780A08 is the 20% darker color. If the color is saturated by 10%, you get
#B23937. If the color is desaturated by 10%, the color
#A4413F is obtained.