How about adjusting for low blue light at night, for Linux? Mint has something, but it did not work well.
I always wear reading glasses day and night with lenses that are designed to block "blue light" in the offending frequencies. So, I do not know anything about that. They are about $3 a pair.
“Blue light blocker&UV400 Lenses, Alleviates visual fatigue and discomfort from browsing mobile phones, tablets, gaming and working under fluorescent lights with UVA/UVB protection and glare reduction.”
“Reduce eyestrain, anti blue ray to a great extent. Enjoy your digital time, NO worry about eye fatigue, blurred vision and headache, let you have a better sleep.”