This seems a bit tongue in cheek, but there is some truth to it. You have to at least be able to seem like someone the 20-somethings can hang out with without

This seems a bit tongue in cheek, but there is some truth to it. You have to at least be able to seem like someone the 20-somethings can hang out with without feeling awkward. This is less about appearance than attitude. If you are enthusiastic and keep up with the youth culture a bit, you can probably fit in ok. I'm 49 and have gray hair, and have since I was in my mid 30's, but I've not had any trouble getting work when I had to (or wanted to) change jobs. That said, I dress fairly youthfully (in typical Silicon Valley jeans/untucked shirt) and am told I don't look my age.