The phone in question is Samsung s21 Fe.
I find I am much more productive when my phone is monochrome however I always find myself turning monochrome off without realising and productivity suffers until I catch myself.
Is there a way to make my phone permanently greyscale? I realise I'm better off without any colour on my phone and if I really need to see something in colour I will use my PC.
I notice there are many ways to turn monochrome on/off (accessibility, developer options, quick shortcuts) so I don't think a password will work.
Can adb or rooting turn off colour mode completely? Can I open up my phone and physically destroy parts of my phone responsible for colour while having an otherwise fully functioning phone?