Richard Knipel chose dark blue because the available photograph of the Bard painting was black-and-white. Rosanoski considers red more likely from other paintings; the colour remains uncertain.
Brooklyn operated for Union Ferry Company between Brooklyn and Manhattan in the 1840s. A painting by James and John Bard, dated about 1846–1849, is the source of the flag reconstruction.
Keep the explicit scope label independent; no alias or company identity is inferred.