[Feedback] Comment Contrast

So I've been seeing more and more 2nd tier comments (replies to a 1st tier comment) being confused for replies to OP (1st tier comments). I mentioned this when the smoother layout was released but I'll just say again I believe the darker comments need to be a tad but darker, to help increase the loss in contrast that was taken away with the more obvious borders that we had before (the bubble minimize days).

Just in case it's a bit confusing I have an example below.

Any kind of visual emphasis on what 'tier' the comment is may help. Maybe a tick mark next to the name? A shift of indentation (Move the higher tier posts to hug the right side evenly but not change the width of the actual comment)? More defined borders (black outlines)? Anything really