In Toyota Canada's press release they called it Portimao blue, not Stratosphere, so that's a pretty solid lead that it's one in the same.
https://www.toyota.ca/toyota/en/about/news/toyota-gr-supra-adds-manual-transmission-and-enhanced-drive-dynamics-for-2023
Hi Everyone,
I put a deposit down on a 2023 manual last Thursday, first at my dealer to do so. Now the waiting game. Still have to decide on the colour... yellow or the new blue.....