Cyan colour hidden ingredient in sleep

[Still Waters]

The colour cyan - between green and blue - is a hidden factor in encouraging or preventing sleep, according to biologists.

University of Manchester researchers say higher levels of cyan keep people awake, while reducing cyan is associated with helping sleep.

The impact was felt even if colour changes were not visible to the eye.

The researchers want to produce devices for computer screens and phones that could increase or decrease cyan levels.

Sleep researchers have already established links between colours and sleep - with blue light having been identified as more likely to delay sleep.

https://www.bbc.co.uk/news/education-44565320

[Opus Magnus]

I find this interesting, because upon waking up there is a strong cyan blue color in my vision. I wonder if this has to do with melatonin and tryptophan levels, and fooling you into thinking you have been rested.