https://www.cnet.com/news/oneplus-5t-gets-a-cool-new-sandstone-white-look/

A new year, a new OnePlus variant. This time, it's the OnePlus 5T, which has been given a fancy new lick of white paint. 

The sandstone white colour, as it's known, also brings a matte texture to the phone. It's designed to mimic the smooth matte feel of earlier OnePlus handsets. While I can't vouch for the similarity, it certainly feels very nice to hold. The toggle switch on the side has been painted bright red too, which stands out nicely against the white.