I associate red light with relaxation and sleep, I’m talking like photo development room red.
Its interesting because orthodox color theory/chromatherapy seems to consider red as excitatory and stimulating but I feel the exact opposite altho there’s a heavy influence of the brightness or wavelength magnitude or something.
Blue is traditionally seen as calming but I associate it more with wakefullness and alert-ness.
Its weird cuz I would find it stressful if the world outside was rendered as red like Mars or Venus or whatever but ironically I have a conflicting intuition that it would make me tired more than anything else 🤷🏻♂️
Red just means night to me, I’m used to it as a nighttime color because of previous work on boats. I actually have red bulbs for my back porch lights because I’m an insomniac and I like to watch the stars but still want to be able to see enough to let my dog out.