The national flag of Croatia (Croatian: Zastava Hrvatske, Hrvatska zastava) or The Tricolour (Trobojnica) is one of the state symbols of Croatia. It consists of three equal size, horizontal stripes in colours red, white and blue. In the middle is the coat of arms of Croatia.

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Republic of Croatia

Trobojnica (The Tricolour)
Use	National flag
Proportion	1:2
Adopted	21 December 1990; 33 years ago (1990-12-21)
Design	A horizontal tricolour of red, white, and blue with the coat of arms of Croatia in the centre.
Designed by	Miroslav Šutej[1]
Use	Civil and state ensign
Proportion	2:3
Adopted	1992
Design	Three equal horizontal bands of red (top), white and blue superimposed by the Croatian coat of arms.
Use	Naval ensign
Proportion	2:3
Adopted	1992
Design	Three equal horizontal bands of red (top), white and blue superimposed by the emblem of the Croatian Navy.

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The flag combines the colours of the flags of the Kingdom of Croatia (red and white), the Kingdom of Slavonia (blue and white) and partially of the Kingdom of Dalmatia (blue and yellow).^{[citation needed]}

The red-white-blue tricolour has been used as the Croatian flag since 1848, and the pan-Slavic colours are widely associated with romantic nationalism. While the Banovina of Croatia existed within the Kingdom of Yugoslavia, it had a similar flag without the modern crown above the chequy. After the Kingdom of Yugoslavia was invaded and Croatia became the Independent State of Croatia, the crown was removed and a "U" was placed at the top left of the flag. Also, the first field of the Croatian chequy was white. After Nazi Germany collapsed and the SFR Yugoslavia was created, Croatia's flag had a five-pointed red star with a yellow border in place of the coat of arms. The star was replaced by the coat of arms in May 1990, shortly after the first multiparty elections. The current flag and the coat of arms were officially adopted on 21 December 1990, about six (de facto) or ten (de jure) months before the proclamation of independence from Yugoslavia and a day before the Constitution of Croatia on 22 December 1990.^{[citation needed]}

The shield depicts the red and white checkerboard of Croatia. Above the shield is a crown consist of shields of its various regions. From dexter to sinister they are the historical arms of Croatia, Dubrovnik, Dalmatia, Istria and Slavonia.^{[citation needed]}

The following colours are specified for use in the flag:^[2]

The national flag of Croatia is represented as the Unicode emoji sequence U+1F1ED 🇭 REGIONAL INDICATOR SYMBOL LETTER H and U+1F1F7 🇷 REGIONAL INDICATOR SYMBOL LETTER R.^[3]

• Croatia in personal union with Hungary (Early 16th century–1526). Banner of Croatian troops (chessboard) in battle of Mohacs, carried by one of the captains of Croatian ban.
• The Kingdom of Croatia under Habsburg Rule (1830). A yellow swallow-tailed flag with the Croatian Coat of arms on it.
• Flag of the Kingdom of Croatia (1852–1860)
• Flag of the Kingdom of Slavonia (1852–1860)
• Flag of the Kingdom of Dalmatia (1852–1860)
• Civil Flag of the Kingdom of Croatia-Slavonia (1868–1918)
• Flag of the Triune Kingdom of Croatia, Slavonia and Dalmatia with the coat of arms, for usage in autonomic affairs. (1868–1918)^[4]
• Flag of the Banovina of Croatia (1939–1941)
• Flag of the Independent State of Croatia (1941–1945)
• Flag of the People's Republic of Croatia (26 May 1945 – 18 January 1947)
• Flag of the Socialist Republic of Croatia (18 January 1947 – 25 July 1990)
• Flag of the Republic of Croatia (25 July – 21 December 1990)
• Variation of the flag of the Republic of Croatia (25 July – 21 December 1990)

• Hrvatska pošta released into circulation two commemorative postage stamps featuring the motifs of the installation flag of Ban Josip Jelačić from 1848 and the contemporary Croatian flag on Croatian flag day, 5 June 2023.^[5]

• Croatian flag flying in Dubrovnik.
• Fans holding the Croatian flag during the 2011 Hungarian Grand Prix.
• Athletes of Croatia entering during the opening ceremonies of the 2010 Winter Paralympics with the national flag.
• A series of Croatian flags during Statehood Day in 2007.
• Croatian Honor Guard during the parade.
• Croatian flag raised in the European Parliament after accession in 2013.
• The Croatian flag during the 2015 World Fencing Championships opening ceremony in Moscow.
• The flag in the Croatian Embassy in Budapest.
• In Crikvenica, fans gathered with the Croatian flag watching the home team playing Portugal during the 2016 Independence Day holiday.

• List of Croatian flags
• Coat of arms of Croatia
• Flag of Yugoslavia
• Flag of the Netherlands
• Flag of Paraguay