How to vertical centre content using ion-grid?



I’m wondering if anyone has figured out how to purely rely on ion-grid to ensure a img, tag or other content is centred on the page by using solely ion-grid?

I’ve done this using CSS styles, but feel I’m going about it the wrong way and wanted to rely on ion-grid if I could to achieve that result, but can’t seem to get the bounding parent to be 100% height for the grid to work… so gave up on that as I was heading towards that being fixed with CSS too…