Flags.

Ever noticed that the flags of four of the most powerful countries in the world, four of the five permanent members of the UN Security Council in fact (all but China), are Red, White, and Blue? And not only that, but only those three colors. I wouldn't dream of going out wearing those colors, but they seem to be in vogue with flag-makers apparently. The four nations are of course the United States, the United Kingdom, Russia, and France. Check it out:

Russia's blue is a little wimpy, but it's still blue and not some other color. In fact, the other three flags use a dark blue more than a true blue. At any rate, I just thought it was an odd coincidence that these powerful nations all use the same basic colors in their flags. And China's flag is red and white - it's just missing blue. If it had some blue in it we might suspect some sort of flag conspiracy amongst the five Security Council members!