Upvote:2
I havenβt been able to find an official source, however according to https://immigrationandmigration.com/countries-that-allow-visa-free-travel-with-refugee-travel-documents/ Portugal does not allow visa-free entry to visitors with the Refugee Travel Document (blue) issued by the UK under the 1951 UN Convention.
You can check on the IATA site by entering your personal details and your intended travel itinerary https://www.iatatravelcentre.com/