To be honest, I am not sure if it was ok or not before rooting. Having said that, when I turned it on, I wasn't stunned by the screen at all and noticed some weird behaviour, like the tone of the screen would change and get a bit of a grey hue at times, sometimes yellow, sometimes pink. I thought this was the light sensor.
When rooted, these stopped, but now I am stuck with a phone that's showing fewer colours than it should. It's probably not 256 colors, but I don't think it's 16 bit.
I attach one of the standard pictures that comes with it to this message. Took this with my webcam, so it's not a great picture, but you can see the face of the girl and those patches of colour between the various tones on her face. I do not think this should display like this?