Official Colors are now on Toyota's USA Website.
https://www.toyota.com/upcoming-vehicles/gr-supra/
If you click view source, here are the color codes.
Absolute Zero White = (A96). Aka Mineral White Metallic
Nocturnal Black = (475). Aka Black Sapphire Metallic
Renaissance Red 2.0 = (A61). Aka Crimson Red
Tungsten Silver = (A83). Aka Glacier Silver Metallic
Turbulence Gray = (C2Y). Aka Bluestone Metallic
Nitro Yellow = (B21). Aka Atacama Yellow
Downshift Blue = (C10). Aka Mediterranean Blue
Phantom Matte Gray = (C3A). Not found in BMW paint code. I believe Tada san did say this was color was unique just to the Supra.