While listening to the radio, I heard a commercial for Diet Violet Mountain Dew. I was mildly interested, since it's rare for Mountain Dew to release a flavored diet soda. When I got to work the next day, a friend told me it was available in the snack stand, and I had to sample it.
When I poured the soda, the bubbles at the top (do you call it "head" when it's soda?) were blue, as you can see in the following picture. The drink itself was a pale violet color, much like the various non-diet violet Mountain Dews of the past.
There was a generic berry smell to the soda, but it smelled stronger than it tasted. The first notes were a bit medicinal, giving way to a fuller, but nondescript, berry finish. Unfortunately, I was painfully aware of the artificial sweetener throughout drinking, even more so than with regular diet Dew.
I have to give Mountain Dew an A for effort for putting out a new diet soda flavor, but I don't think I'll choose it again. There are other diet sodas I like much better (Sunkist Diet Sparkling Lemonade, for example).
Mountain Dew website