<P> The Order of St. Patrick was established in 1783 as the senior order of chivalry in the Kingdom of Ireland . The colour of its honours needed to differ from those of the Order of the Garter (dark blue) and the Order of the Thistle (green). Orange was considered, but the association with orangeism felt to be too sectarian, so the lighter blue of the arms of Ireland was chosen . Knights and officers of the order wore a "sky blue" mantle and riband, a hat lined with "blue", and a badge ringed with "blue" enamel . The name "St. Patrick's blue" was common but never officially used by the Order . The exact shade of blue used varied over time . A sky blue tinged with green was used by Lord Iveagh in 1895 and confirmed in 1903 . </P> <P> There has been debate over the extent to which blue was a national colour of Ireland prior to the creation of the Order, and whether it was associated with Saint Patrick himself independently of the Order . Jim Smyth characterised the Order's adoption of St. Patrick's Blue and Saint Patrick's Saltire as examples of invention of tradition . Shane Leslie speculated that the green - blue of St Patrick's blue might be "but a reminiscence of the woad - stain used by all colour - loving Celts". Constance Markievicz believed blue was "the old colour of Ireland" and incorporated it in the regalia of the Irish Citizen Army (ICA). The ICA banner, the Starry Plough, has a blue field . Antiquarian nationalist Francis Joseph Bigger considered St. Patrick's blue a "fake colour" and Saint Patrick's Flag a "fake flag". More recently, Peter Alter and Christina Mahony have supported the historicity of the colour, while Brian Ó Cuív questioned it . </P> <P> The Irish arms used by English monarchs since Edward IV had an azure field; originally the device was three crowns (now the arms of Munster) until Henry VIII changed it to a harp . This is still the arms of the modern Irish state, and also appears in the lower left quarter of the Royal Standard of the United Kingdom . In Irish mythology, Flaitheas Éireann, the sovereignty of Ireland, was sometimes represented as a woman in a blue robe . Although the arms of the province of Mide has a blue field, when its device was used as the arms of Ireland, the field was sable . The Irish College in Paris, completed in 1776, was renovated in 2002; the paint uncovered on the chapel walls was described as "St Patrick's blue" by a visiting journalist . As regards green in association with Patrick: in 1681, Thomas Dineley reported people wearing crosses of green ribbon in their hats on Saint Patrick's Day . </P> <P> At a "National Ball" during Edward, Prince of Wales' 1868 visit to Ireland, his wife Alexandra wore a dress of "St Patrick blue". In 1886, a garden party given by the Lord Lieutenant of Ireland to showcase Irish manufacturing had an Irish - themed dress code . The Freeman's Journal criticised some of the code as difficult to comply with, but said' Irish poplin ties of "St Patrick's Blue"--which we think looks rather green in a certain light--may (...) be had without much strain .' The Guardian's report of the party stated' the display of the new colour, "St. Patrick's Blue," was everywhere visible .' The 1912 court uniform and dress code specified that the household of the Lord Lieutenant of Ireland should wear St. Patrick's blue, as should Pages of Honour when the King was in Ireland . </P>

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