The white letterbox , and the shrubs , looks really nice . But do you want your bedroom to look like the inside of an esky ? The roof is white , surely you want some colour somewhere on the walls ? The existing walls look a creamy beige , the blind looks beige , the curtains look a fawny beige .

Maybe I'm oldschool , but I like 1 wall as a feature wall with at least some colour , and the rest a plainer version of that . For example , I have a warm blue room , with slightly darker wallpaper on the wall behind the headboard ( heading towards a royal blue ) with a gold stripe around 5mm wide , and then a light blue and another gold stripe only about 1mm wide either side of that ( well , 6-8mm away ) . That probably sounds like something your gran would have had , but it actually looks modern , and interesting .

And again they aren't trendy any more , but the blinds are warm natural wood venetians .

I'm definitely not suggesting that , nor ruling it out , but IMO any white room outside an art gallery is lacking life , lacking colour , lacking imagination -- even if you add some colourful art or duvet colour ( I think you Aussies call them dooners ? ) or rug , its still a white base .

Vivid white on ceilings. Lexicon is a cool white so looks a little shadowy giving off a slight blue . Sunshine typically makes a room pinker. So if you want to replicate that choose a warm white. Your light globes also make a big diff at night,
Change your curtains to something brighter

So many houses are sadly lacking of colour and its paint, you could always repaint later on down the line if you hate the colourful walls but white is so basic, you could try a toned down colour palette but try adding some colour to the walls. We have done a handful of coloured walled homes this year and hands down they look ten times better than the modern and ultra expensive house fit outs we have done.

White on white for everything would be my suggestion. But you’ll have to test in your room. I love white, I find it soothing. You can see examples of everything white on the Three Birds Renovating site.