The flag of Bulgaria is one of the most recognisable national symbols in the Balkans: a horizontal tricolour in white, green and red that encompasses centuries of history, struggles for independence and a deep connection to Bulgarian national identity. Adopted in its current form following liberation from the Ottoman Empire in 1878, it underwent several modifications throughout the twentieth century linked to the country’s political changes, eventually returning to the original version with the fall of communism in 1990. Today it flies as the symbol of a European Union member state with over twelve hundred years of history behind it.
Bulgaria’s flag is a rectangle divided into three horizontal stripes of equal size, arranged from top to bottom in the following order: white, green and red. The official aspect ratio is 3:5, a proportion that aligns it with the flags of many other European states. The colours are defined with precision in the technical specifications adopted by the Bulgarian state: the green corresponds to Pantone 347, whilst the red corresponds to Pantone 185. The white is pure, without chromatic variations.
In the official version used by the government and diplomatic representatives, the centre of the white stripe features Bulgaria’s national coat of arms: a golden rampant lion on a scarlet red background, surmounted by a medieval crown and surrounded by two oak branches. This version with the coat of arms is reserved for official state use, whilst the civil flag — the one that citizens display in windows and seen at sporting events — is the plain tricolour without any emblem. The distinction between civil flag and state flag is codified by Bulgaria’s 1991 Constitution.
The earliest traces of a white-green-red tricolour as a symbol of Bulgarian identity date back to the period of the Bulgarian National Revival, the cultural and political movement that between the late eighteenth and first half of the nineteenth century awakened the national consciousness of a people living under Ottoman rule for nearly five centuries. In this context, the first armed resistance bands emerged, the so-called čete, which adopted flags of various colours but with an increasing tendency towards green and red as symbols of hope and sacrifice.
The decisive turning point came with the April Uprising of 1876, the anti-Ottoman insurrection that, although crushed with ferocity that shocked European public opinion, laid the political groundwork for Bulgaria’s liberation. During this period, monk and revolutionary Paisij Hilendarski had already been the spiritual reference point for Bulgarian nationalism for a century with his Historia Slavyanobolgarskaya of 1762, the first major historiographical work in modern Bulgarian language. It was in this climate of identity assertion that the colours of the future tricolour began to consolidate as a shared symbol.
With the Russo-Turkish War of 1877-78 and the subsequent Treaty of San Stefano of 3 March 1878 — a date now celebrated as Bulgarian national holiday — Bulgaria gained its own autonomy as a principality under nominal Ottoman sovereignty. It was at this juncture that the white-green-red tricolour was officially adopted as the flag of the new state. The choice of colours was influenced by the Russian flag, which had provided military support for Bulgaria’s liberation: white and red were present in the Russian tricolour, whilst green was added as a distinctive Bulgarian element, symbolising nature and the fertility of the land.
The Congress of Berlin that same year reduced the territory assigned to Bulgaria by the Treaty of San Stefano, but did not affect the flag or the institutional identity of the new principality. In subsequent decades the tricolour accompanied the Balkan Wars of 1912-13, the unification with Eastern Rumelia in 1885 and the proclamation of the Kingdom of Bulgaria in 1908 under Tsar Ferdinand I of Saxe-Coburg-Gotha.
With the establishment of the People’s Republic of Bulgaria in September 1946, the flag underwent a significant modification: at the upper left corner of the white stripe, the coat of arms of the People’s Republic was added, which included a rampant lion surrounded by wheat sheaves, a red five-pointed star and the date 9 September 1944, the day of the coup that had brought the communists to power. This emblem underwent further modifications in 1971, when the new Constitution of the Socialist Republic of Bulgaria introduced an updated version of the coat of arms with the addition of a ribbon in the colours of the national tricolour.
For forty-four years the flag with communist emblem was the only officially recognised national symbol, and the plain tricolour — the original 1878 version — became in the final years of the regime a symbol of silent resistance. With the revolutions of 1989 and the fall of Todor Živkov’s regime, the first symbolic act of democratic transition was precisely the removal of the emblem from the flag: on 27 November 1990, the Bulgarian Parliament officially restored the tricolour in its original form, without any emblems.
The official interpretation of Bulgaria’s flag colours is established by law, but coexists with a tradition of symbolic readings passed down through popular culture and national historiography. The white, in the upper stripe, represents peace, freedom and the open future that the Bulgarian people hoped for after centuries of foreign domination. It is also the colour of snow that covers the Balkan Mountains, the geographical and cultural backbone of the country.
The green in the centre is the colour of nature, agriculture and the fertility of Bulgarian land: a country traditionally vocationally rural, where the vine, grain and damask rose have always played a central role in the economy and cultural identity. The Valley of the Roses, which produces most of the world’s rose oil, is often cited as an emblem of this deep connection between Bulgaria and its land.
The red in the lower stripe is the colour of blood shed in the struggle for independence, of the courage of fighters in the April Uprising of 1876 and of soldiers in the wars of liberation. It is also traditionally the colour of military valour throughout Slavic heraldic tradition, a reference that connects Bulgaria to the wider family of Eastern European Slavic nations. Together, the three colours form a visual narrative that moves from peace to prosperity to sacrifice: a journey that Bulgarians read as a synthesis of their national history.
The official version of Bulgaria’s flag used by the state features at the centre of the white stripe the national coat of arms, restored in its post-communist form with the 1991 Constitution. The main element is a golden rampant lion on a scarlet red field, a symbol of Bulgaria since the Second Medieval Empire (1185-1396): the Bulgarian lion first appears on the coins of Tsar Ivan Asen II in the thirteenth century and has remained the heraldic symbol of the country through all subsequent political transformations.
The coat of arms is surmounted by a five-pointed medieval Bulgarian crown, inspired by the crown of the sovereigns of the Second Empire, which explicitly evokes the continuity between medieval Bulgaria and the modern state. On either side, two oak branches with golden acorns frame the whole as symbols of strength and longevity. Below the shield runs a ribbon in the colours of the national tricolour bearing the inscription «Съединението прави силата» — Săedinenieto pravi silata — which translated means “Union makes strength”, the national motto adopted in 1885 on the occasion of the unification between the Principality of Bulgaria and Eastern Rumelia.
The Bulgarian tricolour is often the subject of curiosity due to its similarity with other European flags. The most obvious is the Hungarian flag, which features the same three colours — red, white and green — arranged in a different order and with horizontal stripes in a different sequence (red at the top, white in the middle, green at the bottom). Confusion between the two flags is common enough to be mentioned even in European vexillology manuals.
Less well-known but equally interesting is the similarity with the Sierra Leone flag, which also features three horizontal stripes in green, white and blue: the colours are partially shared but the arrangement and third colour clearly distinguish them. The Bulgarian flag instead shares the white-green-red palette with that of Wales, although the latter is structured in a completely different way with the red dragon on a white and green field.
Another interesting point concerns dimensions: whilst most European flags adopt a width-to-height ratio of 2:3, Bulgaria officially uses the ratio 3:5, a more rectangular proportion that visually distinguishes it from the tricolours of France, Italy and Romania when displayed side by side. The Italian and Bulgarian flags are moreover easily distinguishable: the Italian features vertical stripes in green, white and red, whilst the Bulgarian features horizontal stripes in white, green and red.
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