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No. 186 / 195Flag of United Kingdom
Capital
London
Continent
Europe
Flag adopted
1801(r1)
Designer
Not individually credited

United Kingdom

What the source says

Referenced, awaiting primary-source review
The present design was established by an order in council following the Act of Union 1800. England: red cross of Saint George with white border; Scotland: white saltire of Saint Andrew on blue field; [Ireland]: red saltire of Saint Patrick with white border. Wales [is absent because] the earlier flag of Great Britain was designed while Wales was part of the Kingdom of England.
(r1) Union Jack (Wikipedia (English)), read on 2026-07-17. States the adoption year, which colors the flag has, what the colors mean and the symbolism and history on this page.

Referenced, not verified: a secondary work states this, and the document that constitutes the flag has not been read for this entry. What the marks mean.

Colors and meaning

  • Blue(r1) #00247D

    The blue field of Scotland's Saltire of Saint Andrew(r1)

  • White(r1) #FFFFFF

    Saint Andrew's white saltire, and the fimbriations bordering the other crosses(r1)

  • Red(r1) #CF142B

    Saint George's cross of England and Saint Patrick's red saltire of Ireland(r1)

Symbolism and history(r1)

The Union Flag layers England's Saint George's cross, Scotland's Saint Andrew's saltire and Ireland's Saint Patrick's saltire into one composite design, established in 1801 following the Act of Union 1800; Wales does not appear, as the earlier flag of Great Britain predated its separate representation.

Most similar flags

The 6 closest of the 194 other national flags, ranked by a similarity index computed from the flag images themselves. The number is that index, 0–100 — not a claim that the two flags are “X% identical”.

Computed at build time: each flag is rasterised to 64x48, and the score is 0.55 × colour overlap + 0.45 × structure. A different weighting would rank these differently. How the index works.

References — not verification

Further reading: Union Jack on Wikipedia

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