I can't do grayscale but an intense night light is decent until we get better tech.
Set your phone screen to greyscale and maximum night light.
After a couple weeks, go back to default, and feel your eyes bleed.
I really hope nostr:nprofile1qqswhhhf99z77pfg80s2c00z27rusxn2tzss7450n34krkwa2yadhtgpp4mhxue69uhkummn9ekx7mqpz3mhxue69uhkummnw3ezuerkv36zuer9wcq3vamnwvaz7tmpw5h8yetvv9ukzcnvv5hx7un8lpntld survives and thrives.