In the Interaction Reports I want to style the interactions that returned a "wrong" result to be highlighted in red text in the table.
Is their any inbuilt styling options that could help me with this or should I just add some javascript checking?
unfortunately the "result" is not included in the main interactions report anywhere.
MDL-45712 is the feature request to add it and I've heard from someone recently that may have been able to task a developer to work on it. Add yourself as a watcher to that tracker issue to get any updates.
That is still unlikely to help with styling as it will just add a new field so you may need to write some JS to do the extra work for you.
If you do manage to write something with JS please share it here for others to use as well!