united kingdom - If the Union Jack joins the flag of England and

This chart (public domain from Wikimedia Commons) illustrates the question. Is there an explanation for why the Union Jack have a darker shade of blue than the original Scottish flag that it's base

Make Your Own Union Flag (teacher made) - Twinkl

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The Union Jack - Sketchplanations

UK flag if a United Ireland joined the UK. Also including Wales

The Union Jack

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British Red Ensign Flag

Union Jack Flags for Sale, Made In The UK, Flagmakers

Union Jack 'must always' be flown in 'superior position' to Welsh

Flag of the United Kingdom - Simple English Wikipedia, the free

What's the Difference Between England, the U.K. and Great Britain

Family flag of United Kingdom (Union Jack)

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The UK Flag: Why is it Called the Union Jack?