I don't know what color it is now or whether it's a spade or heart. I'm not sure I even know what a spade looks like. To Kuhn, this kind of dramatic shift in representation is at the core of scientific revolutions. Kepler certainly experienced it when he abandoned the universe of perfect circles. Empirical evidence is still central to Kuhn's view.
Anomalous results have to pile up before a paradigm shift can occur.
But there is still room for psychological explanations of why the anomalies trigger a representational crisis in a Kepler or an Einstein and not others, of how others then become convinced to abandon the old paradigm. In other words, reality, was a sufficient explanation for why scientists eventually discovered aspects of the structure of the universe. Sociology might be used to explain why Kepler took so long to discard the perfect circle dogma and also why not all scientists immediately embraced his view. The Catholic church's resistance to heliocentric models would be such a factor. Here we have sociology as a way of explaining why the right answer, scientifically speaking, wasn't immediately obvious to everyone.