Not all whites go together. And all-white bathrooms can look fabulous or sterile. Grab a sample tile and paint a few sample cards and see what you like.

So far you have five colours for your exterior. I'd stick with one of those for the door and window frames. Hogs Bristle 1/4 is a nice neutral.

You need to choose a colour that pleases you but the inside wall of that alcove does lend itself to a feature. If you want more than just paint colour there are paintable wallpapers that add an embossed look to a wall and you paint over that. Check out Bunnings.

I agree with olidroo about the hedge. When I read your post Shelley, I assumed you wanted something low that would grow in front of the existing hedge, but that you'd still be able to see the hedge. Murrayas would work for a hedge of 2m or more, though I'm unfamiliar with the dwarf variety. The low-growing gardenia would be lovely, but I think they like some afternoon shade. Oldiroo also has a good point about consulting your local nursery as to what would grow in your situation - white agapanthus are very tough where I live in SE Qld. N83 suggested Myoporum parvifolium. This comes in different forms. I'd avoid the broad leaf form. We had some in our garden and it grew quickly and well and we thought - what a great groundcover. Then we realised that it was like it was sucking all the goodness from the soil, leaving nothing for the nearby plants, so we dug it all out. I've also got 2 fine-leafed forms. I like the pink one better as it's a neater plant, but quite low-growing which you may not want.