Mike how would it work if we have 3 tags in one entry and they are all different colors? Take the first tag's color?
Yes. Or take a random tags color. There is no "first" tag because the tags arent sorted, their order is basically random.
Mike What if instead of changing the entire square to a specific color, a small banner icon with each included tag's color be included within the square?
We can discuss that, but I don't think the example banners you posted would work, especially in a smaller screen like on a phone.
Mike perhaps maybe even independently of tags
The problem here is that the database scheme is not prepared to support something like this. I would need to update the database scheme, that would make the new app version incompatible with older app versions. This always causes all kinds of troubles and is something I would want to avoid at this moment.