Vuë de Philadelphie, Balthasar Frederich Leizelt, c.1770, Library of Congress.
The German artist Leizelt has clearly never been to Philadelphia. The architecture, trees, and dress all suggest a continental European city, not an American provincial capital. As we should be suspicious of his depictions of Philadelphia, we should also be a bit suspicious of his depictions of sailors therein.
A few gentlemen and ladies crowd into the stern of this boat as the happy oarsmen lead them out to one of the ships at anchor. None of the sailors wear short jackets. Instead, they wear a variety of waistcoats in red, green, and blue. One wears a round hat, the other a reversed cocked hat.
Another sailor stands in his boat, beckoning the gentleman and lady ashore to climb aboard. He does wear a blue short jacket, and a pair of slops. Underneath the slops we can see a pair of breeches and white stockings. He wears a barge cap as well.
The sailor in the blue jacket appears to be African American, but I can't be sure. the others are largely unremarkable, save for the green jacket in the foreground.