Thanks for your reply. To be honest I am playing around with AC.UI for some hours now and adapting it to my needs and so far I didn't have any problems. So I am not quite sure which color functions are causing problems. But I guess then it would be safe to use it if its only a minor thing. :)
I feel like there is too much misinformation in this thread. Apple do support PWA, just not all features like push. Which is sad, but thats not a reason to disable it completly for those users
I see the problem for the standard theme. But for sites with own styles it wouldn't be too hard to implement a back buttons und gestures work too. Actually the PWA experience on iOS is not that bad though it lacks Push and some other things, but you can still get a nice App-like feeling on iOS...