They wouldn’t be red meat because that’s a mammalian thing.
Depending on the dinosaur and how they move they would either be white meat like poultry or dark redder meat like game birds (geese, ducks, cranes, etc).
A lot of the theropod dinosaurs would have very dark meat legs and white meat breast since they don’t do much flying. Sauropods would likely be very dark meat since they did a lot of walking around grazing.