Intel used to do this. I was a high school and college intern in the late 90s and it was this blue badge / green badge thing.
The funny thing is, there was another level which was how worn out your blue badge was. The longer you had been there, the closer the badge was to white.
If by "this" you meant a caste-like system, then my experience at Intel in 2010s was very different. Different people (contingent workers with green badges and others with blue badges) worked well enough together, and got well enough along (with one or two instances being the exception, not the rule). That's funny about the white badge. I am sure they could have gotten new ones, engineers have the funniest status symbols...
The funny thing is, there was another level which was how worn out your blue badge was. The longer you had been there, the closer the badge was to white.