Blue was entirely my left overs. I had some vague idea about it but threw out the idea because I thought it didn't quite fit together.
Spoilers blue
I'm aware of Wonka as a sub-brand of Nestle, making the Nerds product.
Kinder Surprise and related Kinder products was obvious.
Charms I think is the American extra-sugary breakfast cereal Lucky Charms.
York I even tried looking up and couldn't find any connection. That, combined with the fact that even the first 3 seemed very loosely related, being a brand, a chocolate, and a cereal, was enough for me to reject the idea.