I will try to explain it.
There are already regulations on packaging. They differ from province to province, but they do exist. I will give you a few examples that are easy to understand: cartoons and characters from fables, legends or stories cannot be used on the packaging for alcohol products.
I remember a Norwegian beer that featured little elves on its packaging. In Norway, there are drawings of little elves on beer labels at Christmas time. When the product arrived in Canada, there was a problem with that here. So there are ways to properly regulate product labelling and packaging.
To take it to an extreme, although I am not an expert in the field, I would simply say that you can stipulate in an act or regulations the colours that may be used. There would be a list of the colours allowed or clear guidelines on typography, the type of lettering, and the size of lettering, which already exists in a number of places. Once again, it does not have to be ugly, hideous, horrible or repugnant.
If you gave me a week, I could send you draft regulations that would at least limit these things through proper guidelines.
There are already guidelines on packaging and labelling. They just have to be refined. At worst, to be cautious, we could always use neutral packaging. That already exists for other products. In many supermarkets and elsewhere, there are products with neutral packaging that are very clearly labelled. I am not saying we have to do that. Honestly, we are not experts, but if you give us a week, we will find some solutions.