Haha! I think this is funny. In the 1950’s when margarine became popular, there was such a law also in Minnesota. It was supposed to protect the dairy market.
We would have to squeeze the yellow dye bubble and then play with the bag of margarine to get the color equally dispersed in the margarine. But I think that silly law expired about 40 years ago
They didn't dare give their margarine a presumptuous name like "Can't Believe it's Not Butter"...more like "Can't Believe it's Not Lard".