Only one.
It was originally medium metallic gray. After the Fiero program shut down, It was painted red, all "Fiero" logos were removed and the front nose badge was replaces with a Firebird GTA badge. This is because Pontiac used the Fiero concept car as a Firebird concept car in the early 1990's. Hence why the mid 1990's Firebirds/Trans Am's have a large amount of the same styling as the Fiero concept car.
Our local club about 10 years ago invited GM to bring many of the Fiero concept cars to display at our show. They brought 4 different concept Fiero's and one of them was the 1989 concept car. Still painted red and still wearing the GTA nose badge.