Just posting this as it shows clearly the sepia tones of my Oasis 3. This is it at brightness 12 and warmth OFF. I was going in to the menu to reduce the warmth, as it is now daylight here, and was surprised to see this as the coolest it can go. I personally love the sepia look, but I appreciate it’s not for everyone.
I also added the Decal Girl skin as I love the effect of one large page. This was in order to stop me buying a Kobo Libra - white ereaders are my favorite.. so far, it’s worked!