I knew a 19 year old girl who bought a very bright red car (not deliberately – it was the cheapest one she found), and her uncle told her she should paint it. I was very surprised when I first heard the story because it is so not her uncle’s type to even notice the color of someone’s car, let alone to tell them what to do.
But then the person telling me the story explained that it had been EXTREMELY BRIGHT RED. Added to the fact that she was a single 19 year old girl living in Lakewood. And even so, I am sure there are many who wouldn’t have had an issue with it.
But in most cases, I don’t think anyone would say it’s assur to drive a red car, although I’m sure there are those who would avoid it.
Likewise, there is nothing wrong with most umbrellas. I suppose theoretically there could be some kind of umbrella that REALLY stands out, and in that case, there MIGHT be some people who would feel that a 19 year old girl should avoid walking past a Yeshiva with such an umbrella. But I have never seen such an umbrella and I doubt it exists.
I have no idea what a transparent bubble umbrella is, but it sounds fine to me.