As the appearance of the garden has a modernist style with the straight lines and concrete furniture how about a Mondrian influence and add a bold strip of blue? It is a pond and with the right shade it could look really relaxed and contemporary. My daughter's suggestion is a chalky lilac!

There was a similar discussion last week, maybe you can get some ideas from it: https://www.houzz.com/discussions/help-for-exterior-cedar-siding-trim-color-dsvw-vd~661559

Hi anne, that's what I was originally thinking, my issue is what colour I use for the 'pop' :) I keep coming back to a teal/turquoise colour (it's one of my favourite colours!!), I love blues, purples, teal/turquoise - many on here have suggested yellow but I'm really not sure about it. Here in New Zealand we're in Autumn, nearing Winter so uncertain about the yellow. I found these cushions that I've fallen in love it, and wondering how I could make these work.. do I try teal and mustard together, as an interior designer suggested?

Sophisticated start. You could go with black and white photography, architectural pieces, art pieces- anything you love on the wall. Then, add pillows in the colors of the art work. If you want to stay more monochromatic, think in terms of textural interest, such as a shag area rug, pillows with seam detailing, etc.