Samsung has confirmed that there is a white variant of the Galaxy Note 9. However, it is only going to be available to the Taiwanese market. This new version of the S Pen-toting flagship is reported to go on sale from November 23.
https://www.notebookcheck.net/Samsung-to-release-Pure-White-SKU-for-the-Galaxy-Note-9-but-only-in-Taiwan.364036.0.html