Flags with blue in them

57 of the 126 flags here carry blue, and they do not agree on what it represents. The table gives each country's own stated meaning rather than a generalisation across them.

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• The flag of United States Thirteen horizontal stripes alternating red and white, starting and ending with red, and a blue canton in the top hoist corner holding fifty white five-pointed stars in nine offset rows.
• The flag of India Three equal horizontal bands of saffron, white and green, with a navy blue 24-spoke wheel centred on the white band.
• The flag of United Kingdom A blue field with a white-edged red upright cross and, behind it, a red diagonal cross offset within a broader white diagonal cross.
• The flag of France Three equal vertical bands of blue at the hoist, white, and red.
• The flag of Russia Three equal horizontal bands of white, blue and red.
• The flag of Brazil A green field with a large yellow rhombus, inside which a blue globe carries 27 white stars and a curved white band reading ORDEM E PROGRESSO.
• The flag of Australia A blue field with the Union Jack in the canton, a large white seven-pointed star beneath it, and the five stars of the Southern Cross in the fly.
• The flag of South Korea A white field with a red-over-blue circular taegeuk at the centre and four black trigrams, one in each corner.
• The flag of Ukraine Two equal horizontal bands, blue over yellow.
• The flag of Nepal Two stacked crimson pennants with blue borders, the upper bearing a white crescent moon and the lower a white twelve-pointed sun. The only national flag that is not a rectangle.
• The flag of Netherlands Three equal horizontal bands of red, white and blue.
• The flag of Israel A white field with two horizontal blue stripes near the top and bottom edges, and a blue Star of David at the centre.
• The flag of New Zealand A blue field with the Union Jack in the canton and four red, white-bordered five-pointed stars in the fly forming the Southern Cross.
• The flag of Greece Nine alternating horizontal stripes of blue and white, with a white cross on a blue square in the upper hoist corner.
• The flag of South Africa A green horizontal Y laid on its side, outlined in white and gold, separating a red band above and a blue band below, with a black triangle at the hoist inside the Y.
• The flag of Norway A red field with a blue Nordic cross outlined in white, offset toward the hoist.
• The flag of Philippines A blue band over a red band, with a white equilateral triangle at the hoist bearing a golden sun with eight rays and three gold five-pointed stars, one at each corner.
• The flag of Chad Three equal vertical bands of indigo blue at the hoist, gold and red.
• The flag of Colombia A yellow band filling the top half, with equal blue and red bands below it. No emblem.
• The flag of Romania Three equal vertical bands of cobalt blue at the hoist, yellow and red.
• The flag of Sweden A blue field with a yellow Nordic cross offset toward the hoist.
• The flag of Chile A white band over a red band, with a blue square at the hoist covering the full height of the white band only, bearing a single white five-pointed star.
• The flag of Cuba Five horizontal stripes, three blue and two white, with a red equilateral triangle at the hoist bearing a white five-pointed star.
• The flag of Finland A white field with a blue Nordic cross offset toward the hoist.
• The flag of Iceland A blue field with a red Nordic cross outlined in white, offset toward the hoist.
• The flag of Puerto Rico Five horizontal stripes, three red and two white, with a blue equilateral triangle at the hoist bearing a white five-pointed star.
• The flag of Thailand Five horizontal stripes — red, white, a double-height blue, white, red.
• The flag of Czechia A white band over a red band, with a blue triangle extending from the hoist to the centre.
• The flag of Malaysia Fourteen alternating red and white horizontal stripes with a blue canton bearing a yellow crescent and a fourteen-pointed yellow star.
• The flag of Venezuela Three equal horizontal bands of yellow, blue and red, with an arc of eight white five-pointed stars on the blue.
• The flag of Croatia Three equal horizontal bands of red, white and blue, with the chequered Croatian shield and a crown of five smaller shields at the centre.
• The flag of North Korea A wide red band across the centre edged in white, with blue bands above and below, and a red five-pointed star inside a white disc toward the hoist.
• The flag of Paraguay Three horizontal bands of red, white and blue, with a different emblem on each side of the white band — the only national flag whose two faces differ.
• The flag of Ethiopia Three equal horizontal bands of green, yellow and red, with a blue disc at the centre bearing a yellow pentagram and rays.
• The flag of Ecuador A yellow band filling the top half, with equal blue and red bands below, and the national coat of arms centred over all three.
• The flag of Haiti Two equal horizontal bands, blue over red, with a white panel at the centre bearing the coat of arms.
• The flag of Cambodia A double-height red band between two blue bands, with a white three-towered depiction of Angkor Wat at the centre.
• The flag of Costa Rica Five horizontal stripes — blue, white, a double-height red, white, blue — with the coat of arms in a white oval toward the hoist on the state version.
• The flag of Uruguay Nine alternating horizontal stripes of white and blue, with a white canton bearing a golden Sun of May.
• The flag of Serbia Three equal horizontal bands of red, blue and white, with a coat of arms — a crowned double-headed eagle — set toward the hoist.
• The flag of Bosnia and Herzegovina A blue field with a yellow right triangle along the top edge and a diagonal line of white stars along the triangle's hypotenuse, the top and bottom stars cut off by the flag's edges.
• The flag of Moldova Three equal vertical bands of blue, yellow and red, with the national coat of arms — an eagle holding a cross, with an aurochs head on its shield — on the yellow.
• The flag of Mongolia Three equal vertical bands of red, blue and red, with a golden Soyombo emblem on the band nearest the hoist.
• The flag of Panama Quartered: white with a blue star at the top hoist, plain red at the top fly, plain blue at the bottom hoist, and white with a red star at the bottom fly.
• The flag of Slovakia Three equal horizontal bands of white, blue and red, with a shield bearing a white double cross on three blue hills, set toward the hoist of centre.
• The flag of Slovenia Three equal horizontal bands of white, blue and red, with a coat of arms showing Mount Triglav and three gold stars in the upper hoist corner.
• The flag of Belize A blue field with narrow red stripes top and bottom, and a large white disc at the centre carrying a coat of arms with two woodcutters, a mahogany tree and a shield of tools.
• The flag of Estonia Three equal horizontal bands of blue, black and white.
• The flag of Kosovo A blue field with a gold silhouette of the territory below an arc of six white five-pointed stars.
• The flag of El Salvador Three horizontal bands of blue, white and blue, with the coat of arms — a triangle enclosing five volcanoes, a liberty cap and a rainbow — on the white.
• The flag of Liechtenstein Two equal horizontal bands, blue over red, with a gold princely crown in the upper hoist quarter.
• The flag of South Sudan Black, red and green horizontal bands separated by thin white stripes, with a blue triangle at the hoist bearing a gold five-pointed star.
• The flag of Andorra Three vertical bands of blue, yellow and red, the yellow slightly wider, with a quartered coat of arms at the centre.
• The flag of Lesotho Three horizontal bands of blue, white and green, the white double height, with a black mokorotlo hat centred on it.
• The flag of Eswatini Blue bands top and bottom with a wide crimson band between them edged in yellow, carrying a black-and-white Nguni shield laid horizontally over two spears and a staff hung with feather tassels.
• The flag of Marshall Islands A dark blue field crossed by two diagonal stripes — orange over white — widening as they rise from the lower hoist to the upper fly, with a large white 24-pointed star in the upper hoist.
• The flag of Nauru A blue field with a narrow gold horizontal stripe across the centre and a white twelve-pointed star below it, toward the hoist.