Artificial coloring of Teas

I bought a box of blueberry tea bags in the grocery store the last time I was home and wanted to see how good it was. I boiled my water and placed the tea bag in my mug. Immediately the water turned a deep purplish blue. I thought that this was going to be a really strong tasting tea. I sipped it and it wasn't very strong at all, kind of disappointing really. I randomly talked to a friend of mine about it one night and he said that dye is put into teas. I started researching artificial coloring of teas and got a New York Times article. The title was The Artificial Coloring of Tea; What the Chinese Minister thinks the Practice Continued Simply to Supply the Demand written in 1878.
The article basically stated how the Delegation of New York and Baltimore merchants asked to extend the use of pure teas that the Chinese drink themselves to America. Doing this will stop the shipments of artificial coloring in teas. The minister replied as long as there is a market they cant stop, due to expenses to furnish the teas. The minister stated he is more than willing to stop artificial coloring. Unfortunately, "The remedy rested wholly with consumers not the producers."
That was a surprising article to read. I wonder if today teas are still being produced with artificial coloring. If so, how many different tea brands coming from China have artificial coloring it them, and if the ingredients has to list it.