Might it be sensory dysphoria, I believe it is called? You might want to try a search on the site for articles.
I’ve found that I have developed an increased sensitivity to certain colors that I didn’t have until the last few years…to the point that I can’t stand to stay on a site with those colors. Like you, I invested in reading and asking questions on this site. I’m hoping combination therapy will help calm my responses.
It’s good you asked your question and are trying to find a solution to calm your responses, too. I expect you aren’t alone with this particular sensitivity.