Some up-to-date renders of the Galaxy Note 10 are depicted as having an unfamiliar finish that appears as a gradient from pale purple to pale green. The latest rumors indicate that this is in fact an official color option, called Aura Glow. It may feature on the upcoming 2019 Galaxy Notes, as it now does on matching Galaxy Buds.
https://www.notebookcheck.net/Samsung-develops-new-colorway-for-Galaxy-Note-10-line-and-the-Galaxy-Buds.428314.0.html