The Japanese company Nintendo released a product world-wide in the late 1990s called "Game Boy Color". But in the UK, and elsewhere, "Color" is spelled "Colour".
For a long time, I've been trying to figure out whether they really released it as "Game Boy Color" even in the UK. It seems unlikely, since it would be seen as a typo, but on the other hand, it origins from Japan and that was the original "product name"... So I'm torn between theories.
I've read the Wikipedia article which didn't seem to mention anything about this.