Someone proposed to have a _distinct color for status "unmaintained"._ Status "unmaintained" is currently signalled with gray color, the same as for status "unknown"
The current color scheme can be found at the lower part of page: https://www.mediawiki.org/wiki/Extension_status
The proposal was added here: http://www.mediawiki.org/w/index.php?title=Template_talk:Extension&offse... and somehow related is https://www.mediawiki.org/w/index.php?title=Template_talk:Extension&offs...
Because such a color scheme change can have a wide impact and unwanted side-effects, I cross-post the proposal here.