Those who like a clean and classic look, white is best for them.
If you are looking for a standout colour option, Pink Gold is a good one. It changes its shade from deep indigo to violet in the light.
Black is one of the sleekest options. But the Samsung Galaxy S26 Plus has an interesting colour like Silver Shadow if you are a metallic lover.
I think Cobalt Violet looks good on the Galaxy S26 Plus. There are other options like Sky Blue, Pink Gold, Black, and White.