While testing a new forum I have setup using Discourse, one of my beta testers said it would be neat if the forum has a night mode switch for mobile devices which could reverse the scheme or switch to a darker color scheme easier on the eyes. I think it would be valuable addition to Discourse. I did find a post in support about a night theme but it seems it requires messing with or adding code which I’d prefer staying away from and rather see something like this in the core.
With the last android update, I got a global switch that applies to all apps to reduce the blue. I don’t think this is something that should be implemented on the app level.