Yellow Shift

I have been thinking a lot about red and blue shifts recently, and while this feels in part like nonsense, the concept of a yellow shift has been dancing around in my mind now as well. I'm picturing it something like a parallel motion, perhaps a centrifugal force, or it could be a motion perpendicular to us, but along dimensions that we do not perceive. This effect would cause the EM spectrum to shift to yellow, regardless of which side of yellow it is on, a centering effect.

This then got me thinking that if such a force did exist, it would also suggest an inverse effect, an invisible shift effectively, that would polarize waves regardless of which side they were on of yellow/green, shifting them toward the edges and potentially out of the visible spectrum, either through infrared or ultraviolet.

I just reread my skateboarder in a singularity post, and it got me thinking of the possibility of hidden centrifuges within the clockwork of reality. If both of these effects exist in equivalent measure they would balance and we would not notice them, but if the conditions could be changed and one were reduced it would be possible to see a shift of one of these kinds. If they are of significant strength, which I imagine they would be, we would see a significant shift in the spectrum, without the same high degree of relative velocity that is required to see a red or blue shift of the same magnitude. For example, if the invisible shift were occurring due to the universe's motion through the hourglass that I mention in the skateboarder post, and one could block this in some way, then the EM spectrum would rush to the center of the visible spectrum, and much more would become visible; if these effects are of a strength as significant as I imagine, blocking this shift entirely might even make the entire spectrum shades of yellow, with perhaps some extreme wavelengths at the edges of the spectrum being orange or green. Like I said, in part this feels like nonsense, but something interesting to imagine anyway.

I was just thinking as well, if this is true for light, it may be true for sound. Though the waves move in different dimensions, the Doppler effect results in a similar effect for each, so if this is true for red and blue, could the effect be seen also for invisible and yellow? If the light effect is based on the centrifugal force of the universe around an unexperienced dimension (and a second balancing force I have yet to imagine), what would be the equivalent underlying motions that balance sound?