Imagine you're a protocol officer at the United Nations, arranging 193 flags in alphabetical order for a General Assembly session. You reach into the collection and pull out two flags, Indonesia and Monaco, and realize you genuinely cannot tell them apart without a ruler. This isn't a hypothetical. It's a real, recurring headache in international diplomacy and sport.
Most people assume every sovereign nation has a unique flag, as distinct as a fingerprint. The truth is far stranger. At least half a dozen national flags are near-perfect duplicates of one another, designed centuries apart on opposite sides of the world with zero knowledge of each other's existence.
The most famous case, Indonesia and Monaco, both horizontal bicolors of red over white, sparked a formal diplomatic protest, raised unanswerable questions about who "owns" a color combination, and remains completely unresolved to this day. This is the story of what happens when flags collide, and why, in a world of 200-plus nations drawing from the same small palette, it was always inevitable.
Two Flags, One Design: The Indonesia-Monaco Collision
Place them side by side. Indonesia's Sang Saka Merah Putih is a horizontal bicolor: red on top, white on the bottom, with a 2:3 ratio.
The Flag of Indonesia
View Flag →Monaco's flag is a horizontal bicolor: red on top, white on the bottom, with a 4:5 ratio.
The Flag of Monaco
View Flag →That's it. The only difference is the proportions. And when both flags fly on a pole in the wind, rippling and folding, that distinction vanishes entirely.
Monaco's flag was formally adopted in 1881 under Prince Charles III, but the red-and-white color scheme traces back to the heraldic arms of the House of Grimaldi in the 14th century. Monaco has a strong, well-documented claim to these colors.
Indonesia's claim is arguably even older. The red-and-white banner traces to the 13th-century Majapahit Empire, a sprawling maritime power across Southeast Asia. When Indonesia declared independence on August 17, 1945, the red-over-white bicolor became the national flag. It wasn't borrowed from Monaco. It was drawn from a tradition predating Monaco's use by at least a century.
Here's the uncomfortable truth: neither country copied the other. Both arrived at the same design through completely independent cultural histories, separated by thousands of miles and hundreds of years. No one did anything wrong. They simply ended up in the same place.
The visual absurdity plays out regularly at international events. The two flags get confused, mislabeled, or accidentally swapped. For a small piece of colored fabric, the diplomatic consequences are not small at all.
The 1949 Protest: When Indonesia Said "That's Our Flag"
After Indonesia gained international recognition in 1949, its diplomats entered the world stage and immediately noticed the problem. Indonesia formally protested to Monaco, arguing that the Principality should change its flag to avoid confusion.
Monaco's response was essentially: no.
The Principality pointed out that its modern flag predated Indonesian independence by decades, and that its heraldic tradition stretched back centuries. Indonesia countered with its own centuries-old claim. Both sides had history on their side. Neither had law.
And that's the crux of it. No international treaty, UN resolution, or diplomatic convention requires national flags to be visually distinct. There is no registry, no application process, no review board. The closest analog is trademark law, but sovereignty doesn't work like intellectual property. You cannot file a cease-and-desist against a nation-state over color choices.
The dispute quietly fizzled. No resolution was reached. Both countries continue to use nearly identical flags. Diplomatic protocol relies on context, nameplates, alphabetical placement, the knowledge of the people in the room, to distinguish them. It works. Until it doesn't.
This protest is significant because it's one of the only known cases of a formal diplomatic objection over flag similarity. Nations take their visual identity seriously, even when no mechanism exists to enforce uniqueness.
Poland's Elegant Inversion, and Why It Doesn't Solve the Problem
Now flip the design upside down. Poland's flag is white over red, the exact inversion of Indonesia and Monaco.
The Flag of Poland
View Flag →Adopted in 1919 upon the re-establishment of Polish sovereignty, the white-and-red combination dates to the 13th-century coat of arms of the Kingdom of Poland. Another deep, independent historical tradition. Another red-and-white bicolor.
You'd think inversion would solve the confusion problem. It doesn't. When a flag hangs limp on a windless day, or when an event organizer accidentally displays it upside down, Poland becomes Indonesia. This has happened repeatedly at international sporting events. At the 2016 Rio Olympics, Poland's flag was displayed inverted, effectively turning it into the Indonesian flag on a global broadcast.
The deeper design issue is mathematical. Red appears on roughly 75% of all national flags. White appears on about 70%. With only a handful of basic layouts (bicolors, tricolors, a canton with a field), duplication isn't a quirk. It's a near-certainty.
Poland, Indonesia, and Monaco form a trio of "flag siblings," three sovereign nations whose flags are permutations of the same two colors in the same basic layout. Add Singapore, which places a crescent and stars in the canton of its red-over-white field, and you've got a whole family.
The Flag of Singapore
View Flag →The takeaway is blunt: even when countries differentiate through orientation, the human eye (and distracted event organizers) frequently fail to notice. Inversion is a surprisingly ineffective solution in practice.
The Chad-Romania Problem: When Even Tricolors Collide
The Indonesia-Monaco case isn't unique. Chad and Romania both use vertical tricolors of blue, yellow, and red, in that order. The resemblance is so close that even vexillologists, the people who study flags professionally, struggle to tell them apart without precise color specifications.
The Flag of Chad
View Flag →The Flag of Romania
View Flag →Romania's tricolor dates to the 1848 revolution, with roots in Wallachian and Moldavian heraldic traditions. Chad adopted its flag in 1959, choosing colors that blended the Pan-African palette with France's tricolor influence. Over a century separates their origins. The result is almost pixel-for-pixel identical.
The technical difference: Romania specifies cobalt blue, chrome yellow, and vermillion red. Chad uses a slightly darker indigo blue, roughly Pantone 281 versus Romania's 280. In practice, fabric dyes, printing variations, and sun fading make this distinction meaningless. A Romanian flag left in the sun for a few months and a fresh Chadian flag are indistinguishable.
In 2004, Romanian President Ion Iliescu raised the issue at the United Nations. Chad's response echoed Monaco's position against Indonesia: the flag was not changing. The matter was dropped.
The pattern repeats. Flag collisions are discovered after the fact, protested without legal standing, and left permanently unresolved. The international system has no mechanism, and apparently no appetite, for adjudicating visual identity disputes between sovereign states.
Can You Own a Color Combination?
Here's the central question: if no one copied anyone, and both flags emerged from legitimate, independent historical traditions, who has the "right" to a particular color arrangement?
The answer, both legally and philosophically, is no one. And everyone.
In commerce, identical branding gets resolved through trademark registration, priority dates, and market confusion tests. But nations are not brands. Sovereignty is not a marketplace. There is no "first-to-file" system for flags. The Westphalian system treats each nation's sovereign symbols as inviolable, full stop.
Flags derive meaning not from visual uniqueness but from context. The Indonesian flag means "Indonesia" not because its design is one-of-a-kind but because Indonesians rally around it, display it on their territory, and attach their collective identity to it. The same cloth, flown in Monte Carlo, means something entirely different.
The linguist Ferdinand de Saussure would recognize this immediately. His concept of the arbitrary sign holds that the connection between a symbol and its meaning is conventional, not inherent. Two identical designs carry completely different meanings for different communities, the same way the word "gift" means "present" in English and "poison" in German. Same form. Different meaning. No contradiction.
The discomfort people feel about identical flags reveals an assumption we rarely examine: that national symbols should be as unique as the nations themselves. But uniqueness was never a design requirement. It was an expectation we projected backward from the idea of national distinctiveness. The flag doesn't create the identity. The people do.
Visual Collision Is Inevitable: The Math of 200 Flags and a Limited Palette
Let's talk numbers. There are roughly seven commonly used flag colors (red, white, blue, green, yellow, black, orange). There are four or five basic layouts: bicolors, tricolors, a canton-and-field arrangement, a central emblem on a solid background, and a few variations. With over 200 sovereign states, plus territories and subnational entities, the math is simple. Overlap isn't a bug. It's arithmetic.
Beyond Indonesia-Monaco and Chad-Romania, the list of near-twins is long:
- The Netherlands and Luxembourg: both red-white-blue horizontal tricolors, distinguished only by shade of blue.
The Flag of the Netherlands
View Flag →The Flag of Luxembourg
View Flag →- Ireland and Côte d'Ivoire: green-white-orange versus orange-white-green, mirror images of each other.
The Flag of Ireland
View Flag →The Flag of Ivory Coast
View Flag →- Australia and New Zealand: both blue ensigns featuring the Southern Cross constellation.
The Flag of Australia
View Flag →The Flag of New Zealand
View Flag →Some nations have tried to address this head-on. New Zealand held a $26 million flag referendum in 2015-2016, partly motivated by a desire to distinguish itself from Australia. After months of debate and two rounds of voting, New Zealanders voted to keep the existing flag anyway. Turns out people are attached to their flags precisely because they're theirs, duplication and all.
Technology has made the problem worse, not better. Flags now appear as tiny digital icons: emoji, dropdown menus, profile badges. At 16 by 11 pixels, the difference between Chad and Romania is nonexistent. The need for visual distinctiveness at small scales has increased dramatically, yet the flags themselves remain frozen in pre-digital designs.
And the problem keeps compounding. As new nations emerge (South Sudan in 2011, for example), the pool of "available" simple designs shrinks further.
The Flag of South Sudan
View Flag →New flags face a choice: add complexity, or accept inevitable similarity to something that already exists.
The Flag Doesn't Need to Be Unique. It Needs to Be Yours.
Let's return to that UN protocol officer from the opening. In practice, the Indonesia-Monaco problem gets solved every single day through context: nameplates, alphabetical order, the knowledge of the people in the room. But the fact that it must be solved tells us something about the limits of visual symbolism.
Flags were never designed as part of a coordinated global system. They emerged independently, from local histories and local meanings, and were thrown together into a shared international space only in the modern era. The surprise isn't that some flags are identical. It's that we ever assumed they wouldn't be.
Indonesia and Monaco. Poland's inversion. Chad and Romania. These aren't design failures. They're proof that national identity lives not in the cloth but in the people who carry it. A flag doesn't need to be unique to be meaningful. It just needs to be yours.