[primitivesuave]

I found setting my phone to black-and-white makes me want to look at it less.

On iPhone, the setting is buried under accessibility > display and text size > color filters

[psychomugs]

I was going to say that you could set this as an Accessibility shortcut to toggle Color Filters by triple clicking the home button, but realized while typing that most iOS devices no longer have home buttons.

[dlivingston]

I have it set to a triple-click of the lock button on mine.

[wellpast]

This is a great tip, thank you.