St. Patrick’s Blue

St. Patrick's blue

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.

Blue

Blue is one of the three primary colours in the RGB (additive) colour model, as well as in the RYB colour model. It lies between violet and cyan on the spectrum of visible light. The term blue generally describes colours perceived by humans observing light with a dominant wavelength between approximately 450 and 495 nanometres. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called the Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.

Saint Patrick

Saint Patrick was a fifth-century Romano-British Christian missionary and bishop in Ireland. Known as the "Apostle of Ireland", he is the primary patron saint of Ireland, the other patron saints being Brigid of Kildare and Columba. He is also the patron saint of Nigeria. Patrick is venerated as a saint in the Catholic Church, the Church of Ireland, Lutheranism, and in the Eastern Orthodox Church, where he is regarded as equal-to-the-apostles and Enlightener of Ireland.

st.

Noun

1. Alternative letter-case form of St., abbreviation of street.

blue

Adjective

1. Of a blue hue.
2. Depressed, melancholic, sad.

Noun

1. The colour of the clear sky or the deep sea; the colour midway between green and violet in the visible spectrum and one of the primary additive colours.
2. Anything coloured blue, especially to distinguish it from similar objects differing only in colour.