@julianned When your eyes fatigue because of staring at a color for a long time, you will start to see a complimentary color instead. You can test that by staring at a shape like a colored dot for a few minutes, then look at a white sheet of paper and you'll see the afterimage in a complimentary color. The primary colors of light are red, blue and green. I think your color shift is happening because of sleeping in the sunlight and your retinas are not getting any rest. The light goes through the eye lids. Can you try a black out mask for sleeping or blackout shades on the windows if you are indoors? I have great color acuity because I was trained to see the nuances when I went to art school, and I've noticed that my eyes see color a little differently. One eye sees a slight red cast, and the other sees a slight green cast. Color vision comes from "cones" which are nerve endings on the retinas. Nerve impulses involve neuro-transmiters which are molecules that have to cross the gap between nerves to send the impulse along the the path to the brain where vision is interpreted, so your retinas have to do this and this process will fatigue with constant stimulation. When the cones for a particular color fatigue, they are less sensitive to that color which makes the opposite color of light more effective because it's opponent has fatigued and kind of quit the game. This study describes this effect of chromatic adaptation in a blue vs yellow color shift. Blue and yellow are opposites for light colors, and all colors are present in white light. When you see a rainbow or use a prism, the wavelengths for the different colors are separated and displayed. See page 13 of this study. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC224321/pdf/pnas00145-0005.pdf

I use color balanced LED lights for photography and accidentally looked at an LED panel at close range with it set to 5500 K which is a daylight setting with a bluish cast. Exposure to the blue light can be damaging to the retinas over time which is why there are blue blocking lenses in glasses. Even though I looked away immediately, I still saw an image in one eye of the dots on the LCD panel for a while and I worried it might be permanent. I saw my ophthalmologist who didn't see anything wrong on the retina. After a couple months, it went away on it's own, so I presume that whatever happened in there must have healed. If you are seeing dark shadowy things that move when you move your eye, those are likely floaters which are the shadows of some cellular debris that are cast on the retina. I have those too. I have found that taking astaxanthan supplements have helped my vision get better and sharper, and also my nearsightedness has improved. That is a zeaxanthin and vision supplements have these. Sometimes improvement of nearsightedness happens as people age. I also think it has something to do with taking off my glasses to do my art work and my eyes worked a bit more to focus at that distance. I have a biology background, and I'm not a health professional and this is just my experience and how I understand how the body works. Hopefully some of this will explain in simple terms about how it works.