If you have the possibility to paint this wall again in soft beige, do it. Then put a wide painting on the wall you have previously colored and fill the room with accessories of the same painting's color. You can change this painting every few years along with its accessories and have a new ambiance ever time!

To answer your question I would paint the body of the house blue, all trim white, and then the "fringe" which I think ties into your porch decking, I would paint it the gray. It is a good "grounding" color for your home. Sherwin Williams has a cool web tool. Take a pic of your house and load it onto their site. You can "color" away on your house. When I painted my house for the first time, I did not want the garage door to stick out, wanted it to blend into the house. Everyone said it would look weird, needed to be painted the same as the trim. Used the Sherwin Williams site and realized want I visioned looked good. I have neighbors of dubious design skills! Ha! Ha!

I don't know how hot it gets in Auckland in summer (I've only ever been to NZ in winter!) but if it gets hot, then go for a pale colour. Dark roofs should be kept for cold places!

Flooring should be light. I'm not sure how a bamboo floor would work. Did you end up going ahead with the kitchen plans? What did you go with?