Hi, In bug #9086 [1] there was a lot of good discussion about case insensitive matching for dircolors. This was all then summarily ignored in [2] which made the behaviour unconditional. This breaks coloring of uppercase files that should have a different color from lowercase files, for example .C which is a c++ source file, not a c source file. And as mentioned in [1] it is also very useful to notice incorrectly (eg uppercase extension files) quickly by them being white, so you can fix them.
I'm not sure if the suggestion in this bug (33123) is good though; since ls --color=auto-case will just error on older releases, you can't easily sync your aliases. Unfortunately ls also ignores all of LS_COLORS if it contains any unknown values (why??) so we can't add a "CS" field there for case sensitiveness either (unless there's some extra options field already I don't know about?). If anyone has some ideas I would be happy to produce a patch (assuming you don't need copyright assignment). [1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=9086 [2] https://lists.gnu.org/archive/html/coreutils/2018-06/msg00011.html -- Mikael Magnusson