Three pairs of flags can make even confident geography fans hesitate. The trick? Check the colour order, then the shape, and only then the shade. Here, ratios mean height:width. The FlagCDN illustrations below keep those proportions; all are shown with the hoist on the left.
Romania and Chad: the blue-band challenge
Both have three equal vertical bands: blue, yellow, red, starting at the hoist (the edge attached to the pole). Both are 2:3, so shape will not rescue you. Chad is commonly depicted with a slightly darker blue than Romania—but this is a subtle rendering clue, not a foolproof test. Lighting, screens and flag manufacturers can blur the difference.
Remember: same order, same shape; check the blue, then the context. A tiny icon may not provide enough information.
Sources: Flags of the World on Romania and Chad.
Ireland and Côte d’Ivoire: start at the pole
Ireland runs green–white–orange from the hoist; Côte d’Ivoire (Ivory Coast) runs orange–white–green. Think “Ireland starts green.” In a standard illustration with the hoist on the left, the leftmost stripe is your quickest clue.
There is a second check: Ireland is 1:2, while Côte d’Ivoire is 2:3. Ireland’s flag looks more elongated. A reversed photograph can swap apparent left and right, so locate the pole rather than guessing.
Sources: Ireland’s flag; Côte d’Ivoire’s flag.
Indonesia and Monaco: measure the rectangle
Both have two equal horizontal bands: red above white. Indonesia is 2:3; Monaco is 4:5, making Monaco’s flag closer to a square. Monaco also appears unofficially in 2:3, so shape is a clue, not a guarantee. Memory hook: “Monaco, more square.”
Compare their shapes, not just their colours. If a quiz stretches both into identical boxes, that clue disappears—use the country choices or surrounding context instead.
Sources: Indonesia’s flag; Monaco’s flag.
Ready to spot the difference? Try the flag quiz on CapQuiz.