Hey all, overriding this style using plain CSS as suggested so far is not the way to go if you want to do it properly.
And by properly I mean, using the SCSS variables that ionic uses. Thats the preferred way to override ionic stuff from what I understand.
The variable is $ios-transition-container-bg-color and is located in _transitions.scss.
For those not familair with overriding the ionic variables, you would simply add set the variable in your app SCSS, somewhere like ionic.app.scss or _variables.scss
E.g.:
$ios-transition-container-bg-color: #fff;
or, as some have suggested using transparent, you can use:
$ios-transition-container-bg-color: transparent;
I dont however, know WHY this background is set for ios and not android, I have a separate thread I created for that here: Why does ios need a black background in _transitions.scss