We know some facts re iPhone 8 home button area:
• it resizes
• indicator can be hidden
• no API to change color
• tab bars extend under it
Troughton-Smith says these four things are supported by API evidence.
Having bars bleed under it, and no color API, suggests w/e indicator there is for the home button will have to contrast well with all bgs
He also notes that there is no evidence that app UI moves to the Home button area, contradicting speculation that Apple could move navigation controls to the bottom for easier one handed use.
There is a system periphery area that expands/minimizes and shows/hides the home button indicator as needed. Mock up accordingly
More details about the iPhone 8 keep surfacing daily. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.