Negroid or not? lol I do not think we know whether Jesus was even a real person or a single person let alone a skin tone or fitting one of the racial characteristic that modern humans have made up. We have lots of secondary source that are often conflicting. There are accounts that if he did live he did not even die on the cross.

As for Mediterranean Arab well... what the hell does that mean. I have known Arabs from Lebanon who are blond and blue eyed and who will tell you their ancestors have lived in the region for thousands of years. Listen the concept of "race" is the problem. If you are thinking "negroid" like from the Congo well I would say "I doubt many people at the time and place Jesus might have lived shared those specific features." On the other hand we do not completely know because unless you have his bones or a time machine its pretty much gone from scientific recovery.