triple scroll + fullscreen?

Hi Guys, I'm making a 3col scrollpage see example. how would you guys go about aolving this? all 3 need to have different coloured backgrounds, that are fullscreen independant of content size. all 3 need their own scrollbars. width needs to be % but have a min-width. my first inclination would be to completly rebuild Atlas using flexbox, but I wonder if there is a more "Mendixy” way of doing this?    
1 answers

Do you mean something like this?

For this application the main and right panel have a different scrollbar.
We use the scoll container for that.