I would suggest one focal point wall painted John Deere green with huge logo painted on the wall other walls neutral. Maybe sleek black furniture , black rolling toolboxes for night stands, etc. when he gets tired of John Deere then just paint over the accent wall and you're ready for the next theme.

It's refreshing to see nautical, navy BLUE. Everyone is saying the same thing for the most part - just introduce another color, definitely bright (yellow or orange IMO) and it will make it more current. What I really like is how your style will withstand the test of time - and with minor updates now and then it will always look fresh and "current".

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?

Absolutely no problem changing up the carpet. Things to watch for......make the transition in a doorway, an opening or along a visual break in the rooms (like the corners of the walls). I would stay in the same colour range, but just go to the other end of the spectrum rather than change the colour completely.....like light grey going to dark grey, not light grey going to navy blue. You want the separation but an easy transition on the eyes.