She is usually black, jet black almost, usually has a larger abdomen, on the abdomen most commonly their is an hourglass, usually red, but that's not always the case, depending on the widow. Some have three red spots, some have orange, some have yellow, and some black widows are entirely black. The other way to identify them is their legs are very long, very lanky, and no hair on them. So if you see something that looks like a black widow but doesn't have an hourglass its still probably a black widow.