Here we can see the bathroom's layout is a T shape, the stalls extend left and right, a pure right angle made out of banded red. This is one of Jack's death scenes. The spilling and cleaning a ritual to remove Jack's 'color'. This room is the next color animation as Jack heads towards his black and white graven image. Consider the yellow world, its gauzy luminosity and indirectly diffused lighting they came from seconds earlier and this glaring red and hue-less white room in contrast:  the gold ballroom purified into this color extremity from primitive forms to this modern commode.

JACK "Grady? Delbert Grady."