Hi,
With reference to the AWI Brits, the colour looks like the gosling green facings of the 5th. They fought in the early battles of the war including Bunkers Hill, Germantown and White Plains. However, when the French entered the war, the 5th were sent to protect the important spice islands of the West Indies. It was at St Lucia (1778) where they defeated the French, taking the feathers from their hats. They are still worn today by the Royal Regiment of Fusiliers of whomn the 5th (Northumberlands) became a part.