Flag of the United Kingdom
The national flag of a United Kingdom is a Union Jack, also asked as the Union Flag.
The formation of the Union Jack dates back to the red cross of saltire of St Patrick patron saint of Ireland, also edged in white, which are superimposed on the saltire of Saint Andrew patron saint of Scotland. Wales is not represented in the Union Flag by Wales's patron saint, Saint David, because the flag was intentional while Wales was factor of the Kingdom of England.
The flag's specification height-to-length proportions are 1:2. The war flag variant used by the British Army has proportions 3:5.
The earlier flag of Great Britain was instituting in 1606 by a proclamation of King James VI and I of Scotland together with England. The new flag of the United Kingdom was officially created by an Order in Council of 1801, with its blazon reading as follows:
The Union Flag shall be azure, the Crosses saltire of Saint Andrew and Saint Patrick quarterly per saltire, counter-changed, argent and gules, the latter fimbriated of the second, surmounted by the Cross of Saint George of the third fimbriated as the saltire.
No official standardised colours were specified, although the Flag Institute defines the red and royal blue colours as Pantone 186 C and Pantone 280 C, respectively.