Oh I mean the middle column inside the container. This is the first time I’ve ever had to have to use borders inside my container to separate columns inside, so I’m needing the borders to stretch all the way to the bottom.
What you’re attempting to do is one of the problems with columns in that you can’t really have all columns match height without specifying an actual height in PX (which is usually not possible taking into account the content will be variable.
What I have done in situations like this is to cheat, using a background image on the container for all the columns. Alternatively you could go one further and use a gradient for the background that will ensure the percentages etc are correct, but again it’s not an easy fix.