Taxis in Seville are white with a green light on the roof. Coincidently, these are the same colours of the local football team, Betis. You can raise your hand to hail a cab or catch one at rank, main stations and at the Seville San Pablo airport.
Taxi fares are comparably cheap with the rest of Europe but be prepared to be in the cab for some time if travelling in the centre. The streets are very narrow and taxis move at a snail’s pace, especially in summer when the streets are full of pedestrians. On the plus side, if you do speak Spanish, the taxi drivers are very friendly. Just don’t expect much English.
The meter will show the fare, but extra fees may occur, for example with luggage to be handled.