Which Irish fraternity founded about 1750 adopted green as its colour?

The Irish fraternity founded about 1750 that adopted green as its colour was the Friendly Brothers of St Patrick.

The Friendly Brothers were a charitable and social fraternity established in Ireland during the eighteenth century. Their adoption of green is part of the longer history of green becoming associated with Irish identity and Saint Patrick’s Day.

Green had several earlier associations with Ireland. Irish tradition connected the island with greenery, while the green harp flag was used by the Irish Catholic Confederation in the 1640s. Green ribbons and shamrocks were also worn on Saint Patrick’s Day by at least the 1680s.

A common mix-up is with the Order of St Patrick, founded in 1783. That Anglo-Irish chivalric order adopted blue, not green. Green later gained stronger nationalist associations through the United Irishmen in the 1790s and became the dominant modern colour of Saint Patrick’s Day.