Overriding Ionic Sass Variables

I can’t understand how override the ios toolbar button color, it’s always get $primary color.
I tried:
$toolbar-ios-text-color: #FFFFFF;
$toolbar-ios-button-color: #FFFFFF;
$toolbar-text-color: #FFFFFF;

FYI: @mhartington

After deep reading the material design tutorial, I did it.

$toolbar-active-color: #FFFFFF