The Italian tricolour is adopted for the flag of the Kingdom of Sardinia by Charles Albert of Sardinia during the First Italian War of Independence.

The flag of Italy, often referred to as the Tricolour, is a flag featuring three equally sized vertical pales of green, white and red, with the green at the hoist side, as defined by Article 12 of the Constitution of the Italian Republic. The Italian law regulates its use and display, protecting its defense and providing for the crime of insulting it; it also prescribes its teaching in Italian schools together with other national symbols of Italy.

The Kingdom of Sardinia, also referred to as the Kingdom of Sardinia and Corsica among other names, was a kingdom in Southern Europe from the late 13th until the mid-19th century. The kingdom's history can be divided into two distinct phases, one as part of the Aragonese and Spanish crowns (1324-1720) and one as a possession of the Savoyard state (1720-1861).

Charles Albert was the King of Sardinia and ruler of the Savoyard state from 27 April 1831 until his abdication in 1849. His name is bound up with the first Italian constitution, the Statuto Albertino, and with the First Italian War of Independence (1848–1849).

The First Italian War of Independence, part of the Risorgimento or unification of Italy, was fought by the Kingdom of Sardinia (Piedmont) and Italian volunteers against the Austrian Empire and other conservative states from 23 March 1848 to 22 August 1849 in the Italian peninsula.