the colour blue no relation Republic of Ireland
St Patrick's blue is a name often mistakenly applied to several shades of blue associated with Ireland. The official colour of Ireland in heraldic terms is azure blue. The colour blue's association with Saint Patrick dates from the 1780s, when it was adopted as the colour of the Anglo-Irish Order of St Patrick. The term refers to a sky blue used by the Order of St Patrick, often confused in Ireland with a darker, rich blue. There is no de jure national colour in Ireland, with the only reference to any colour(s) appearing in Article 7 of the Irish Constitution in regards to the national flag. However, while green is the de facto national colour of Ireland, representing Ireland in many sporting, cultural, and business events, azure blue is still found in symbols of both the state and the island.
no relation