When taking a picture of red roses in my garden, the camera screen colour is very different from what I'm seeing, even...

Maybe this is not much of an answer as I bet you've already tried this action: Have you tried experiencing with the white balance settings? If not, have a go to see if you can get any improvement. There's also a colour hue adjustment on this camera, albeit that I tried it with little success. It's hidden in the settings. If you use it, though, remember your original settings so that you can revert if necessary. As a last suggestion (and incidentally I too have issues with this camera) see what happens when you select the option that takes three (I think) photos of the same shot all with slightly varied colours. I hope that something in these ramblings might help you!