I don't want to maintain my own library of music, which is why I use streaming services.I also said I'd like to have an algorithm.
Blue has a smaller wavelength, so when something is approaching fast it "squishes" the light, making a smaller wavelength.
https://health.clevelandclinic.org/put-the-phone-away-3-reasons-why-looking-at-it-before-bed-is-a-bad-habit
I don't want to support services intentionally restricting users. It's defective by design