This conception of trajectories of particles in spacetime is an idealization principally of the visual aspect of human experience, and such things as Kepler's astronomical observations, and Galileo's observations of motions of terrestrial objects. So there is a intuitive basis for linking observations pertaining to locations and shapes to the notion of locations and shapes of aggregations of microphysical entities that are just idealized limits of observations of locations and shapes. This is the basis of the linkage between CPT and our human observations. Observations concern appearances, not how things are. That is not how CPT is set up.
Observations are what seems to be.
We do experience warmth, and the shape of Orion. The issue is the nature of the basic link between theory and observation. The trajectories determine rate of oscillation, which may determine perceived color. But that is empirical. This same oscillation logically could have produced a different experienced color.