https://www.cnet.com/news/oneplus-6-red-is-coming-to-the-us-in-july/

After a successful launch in May, OnePlus is adding red to the 6's colour palette, it announced Sunday. 

The red OnePlus 6 will only be available with the 128GB storage, 8GB RAM setup, but in all of OnePlus' existing markets. That means the US and UK are covered (for $579 and £519, respectively), but not Australia (US price converts to $785, if you wish to import).