While it might be easy to dismiss this rumor, it should be noted that previous rumors about the iPhone 12 have also suggested that Apple might offer a new blue finish for the iPhone, so a blue Apple Watch would not be a stretch of the imagination, since Apple could market it in such a way that a blue iPhone 12 and Apple Watch Series 6 could make for a nice matching set.
https://twitter.com/L0vetodream/status/1304829273509826560
We’re not sure how blue this blue will look like, but if it’s anything like the iPhone 12 rumors, we could be looking at a navy blue finish that would add a nice hint of color without being too loud or garish. Apple currently has an event scheduled for the 15th of September where it is largely expected that the Apple Watch Series 6 will be announced alongside new iPads and a new services bundle where Apple could combine multiple subscription services into a single package.