https://www.techradar.com/news/samsung-galaxy-s10-now-on-sale-in-red-but-you-probably-wont-be-able-to-buy-it

Samsung often releases new color choices for its phones a few months after launch, and for the Galaxy S10 range we're being introduced to Cardinal Red.

Samsung's Galaxy S10 and Galaxy S10 Plus are both now available in the red shade, but so far it's only on sale in Switzerland.