I have very little to add about the color aspect, but I can say that I love my Kobo. I've had three Kindles before buying the Kobo, which I got because it has a "better" integration with my local library (better in quotes, because I still have to do with the Adobe DRM, which is so bad on Linux that I borrow my wife's computer just to transfer).
The Pocket integration is fantastic, as are the physical page turn buttons. I always thought they were unnecessary, but I really do prefer them now. The warm night light is also great. It's a bonus as well not to be in the Amazon ecosystem more than I have to.
The biggest downsides are maybe a bit niche: the dictionary is terrible (although you can upload your own, but not make it the default) and there's no built-in translate function. I read mostly in my non-native language, so these two features make life a bit more difficult, but they're outweighed by the rest.
The Pocket integration is fantastic, as are the physical page turn buttons. I always thought they were unnecessary, but I really do prefer them now. The warm night light is also great. It's a bonus as well not to be in the Amazon ecosystem more than I have to.
The biggest downsides are maybe a bit niche: the dictionary is terrible (although you can upload your own, but not make it the default) and there's no built-in translate function. I read mostly in my non-native language, so these two features make life a bit more difficult, but they're outweighed by the rest.