I had a scarf about that long when I was about 14. It was black, though.
I wore it in school and it was confiscated. That very evening I came down with nasty bronchitis, and was away from school for about a week. I was wearing it because I felt weirdly cold (fever coming on, presumably) and my throat hurt.
I never saw my lovely scarf again.
True story.
Yellow can be cheerful. That much needs sunglasses to look at. Cynic in me thinks they're really wanting to sell sunglasses.