Hi folks, I was just reading about symmetries, and why we say that the two spin states of the electron are states of the same particle, while we are free to say that the two strong isospin states define tow different types of particle. According to the book I'm reading, we must attribute two spin states to one and the same particle because the dynamics can distinguish between states of different spin (the triplet state having a different energy than the singlet state, for example). But that made me think: what about color? We say that e.g. each quark has 3 color states, but can be the dynamics distinguish between these states? Any thoughts much appreciated!