Flag Tone
Ten countries, five rounds. Each round names a specific region of a national flag — a stripe, field, or disc. Recreate the exact color from memory using hue, saturation, and brightness sliders. Scored by Delta E 2000 perceptual difference. Flags are more memorable than they seem, but the "official" colors are often deeper and richer than the memory of them — flag colors are heavier than their common associations suggest.
How to play
- Click Start Game to begin round 1 of 5.
- Read the country and flag region. Adjust hue, saturation, and brightness sliders to recreate that region color from memory.
- Click Submit Guess. The correct color is revealed, and your match is scored by Delta E 2000.
- Repeat for 5 rounds — 20 points each, 100 total maximum.
Why flag colors are deceptive
National flag colors are specified in national laws using physical standards (or occasionally Pantone or RAL codes), and they are reproduced differently across contexts: on screen, on fabric, on official state documents, on merchandise. The result is that most people remember a "flag color" as a family of related shades rather than one specific value. France's blue in the tricolore (#002395) is a deeper and more violet-toned navy than the "French blue" most people picture. The UK Union flag blue (#012169) is even darker. Japan's sun disc red (#BC002D) is more crimson than the "Japanese red" that appears on souvenir goods.
The game is calibrated against the most commonly cited digital approximations of each flag's official colors, not against memory. This makes it a genuine test of how accurately you remember the exact shade, not just the general hue family. Scores are usually in the 50–80 range — better than Toon Tone because flag colors are more consistently reproduced, but worse than people expect going in.
Tips for higher scores
- Flags use deep, rich colors — not the pastel versions people tend to picture. If your guess looks "bland," it is probably too muted.
- National blues are almost always darker than royal blue. French, UK, US, and Swedish flags all use deep navy-adjacent blues.
- Reds on flags are usually pure red or a slightly crimson red, not orange-red (except Spain, which is warm).
- German black is not pure #000000 — it is often specified as a very dark grey or a specific black ink. Same for other "black" flag colors.
- Brazil's green is a mid-tone emerald, not a forest green. India's saffron is a warm orange, not a yellow-orange.
Frequently asked questions
How does Flag Tone work?
Each round names a country and a specific region of its flag (usually the leftmost stripe, the top stripe, or the central field). You adjust hue, saturation, and brightness sliders to recreate that region color from memory. Submit to reveal the correct color and see your Delta E 2000 score. Five rounds, 20 points per round, 100 points max.
What countries are included?
Ten: France, Germany, Italy, Spain, Japan, United States, United Kingdom, Brazil, India, and Sweden. Each round picks a specific region of the flag — usually a dominant stripe or field — so the target is unambiguous. If you know your flags, this is easier than the other tone games. If you do not, this is a surprisingly humbling experience.
Are these the official flag colors?
They are widely-published approximations of the official national flag colors. Exact flag colors are specified in national laws using various color systems (sRGB, Pantone, RAL, or plain national standards), and the values here are the most commonly cited digital translations. Some countries have multiple official flag variants (naval, civil, state) — we use the civil flag variant unless otherwise noted.
What is Delta E 2000?
Delta E 2000 (ΔE00) is the CIE standard for perceptual color difference. It measures how different two colors look to the human eye, accounting for the fact that we are more sensitive to differences in some hue regions than others. Lower is better: under 2 is imperceptibly close, under 5 is close, over 10 is clearly wrong. Delta E 2000 is more accurate than Delta E 1976, which produces misleading scores for saturated blues and purples.
How are points calculated?
Twenty points per round maximum. Each unit of Delta E costs 2 points: ΔE 0 gives 20 points, ΔE 5 gives 10, ΔE 10 or more gives 0. Five rounds total, so 100 points is a perfect game. Most first-time players score 50–80 — flag colors are more memorable than cartoon character colors because they are consistently reproduced everywhere.
Why is my memory of the French flag wrong?
Because the "French blue" of the flag (#002395) is darker and more violet than the "blue" most people picture when they think of France. Same for the UK Union flag (#012169) — it is a deep navy, not a royal blue. Many national flags use colors that look "heavier" than their general associations. The game is calibrated to the official approximations, not to memory.