Does this mean the beginning of the end of the HN I know and love? Maybe now you will make a mobile app? Hang a banner warning that you store cookies? Forbid to use adblock?
I could not understand for a while what this differentiation means. My first thought was that green posts - being voted positively and vice versa. Now I realized that they are simply alternating. It reminds me Mark Miller's "Tragedy of Common Lisp" story, and maybe the theory of broken windows a little bit.
Thank you for all the wonderful that I discovered because of you.
Here it is in 2007:
https://web.archive.org/web/20071225140214/http://news.ycomb...
Another theme change you might notice from time to time is a black bar at the top of the page, which is displayed when mourning for a recently deceased person of particular IT or hard science prominence.