Hi, Ive had a Kobo Clara HD for a few months now with Koreader installed and have being using it mainly at night, in a dark room with the brightness (front light intensity) set between 5 - 15 and the comfort light set around 40 - 60%.
My partner has just bought a Kindle Paper White Signature Edition (the standard one was out of stock) and we were comparing screens etc.
Ive now noticed, having had the comfort light on the kobo pretty much in the same position for ages that even at 0% with the auto settings disabled, at anything bellow a brightness setting of around 30 the screen has a significant yellow tint.
I have tried in both the default kobo reader app and Koreader and the results are the same. Ive done a factory reset and a manual reset and nothing has changed.
Im starting to think this is a hardware issue but before I try to get it fixed under the warranty I wanted to check that this isnt just the default behaviour? I would assume with the comfort light set to 0% (auto disabled) that whatever the brightness the screen would be illuminated only with white/blue light something similar to the kindle....
This is a comparison photo at similar settings on the kindle/kobo (if ive managed to share it correctly)....
https://photos.app.goo.gl/KYSzJuaH5MtwVxGc7