The puzzle ribbon is the "sign" of autism. It means neurodiversity.
The "orange" was created, as far as I know, by the people of Aspergia, who wanted to create a discrete passport so that they could recognize one another by seeing it. But an orange bracelet is more common than a puzzle one, so it is not really the sign of Asperger. Additionnally, although I do not know what the color orange means (I think it means impulsiveness), it does not really mean Asperger. So maybe the puzzle one would be more meaningful. But orange puzzle pieces could be prevalent to make the Asperger ribbon.
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Nicolas (spark).