I would go off the code numbers for these first, as surprisingly the names can change in different countries.

I agree with Jan -- a lot is personal , and your lifestyles . You say neutral colours , so a wheat type colour for the carpet is a good middle of the road choice , but maybe not practical with kids who like crayons and facepainting and stripping down motorbikes haha . So in that case , maybe a burgundy or mid blue or similar 'solid' colour may suit better ( burgundy may tie in more with the exterior tones ) , but is still sort of neutral , but what about furniture and linen and artwork -- if you have royal blue or fluro green drawers and a brown chair and sunshine yellow duvet/dooner cover , and the room is for someone older than 4 , then burgundy carpet mightn't be the go haha . The existing wall colour works with most things , you can add artwork or posters or sports or academic certificates -- maybe back to front , but I'd sort out everything else ( carpet , furniture , etc ) before deciding on a wall colour , unless sticking to the existing or similar colour .

Hi there, If you want to keep it very soft and light then Terrace White a great choice. If stark is your concern its a great opportunity to add some more interest with colour/depth. Colour wise, something to compliment the terracotta but sits well with grey could be Dulux Snow Season Quarter or Subdue Half. Darker you could try Wet clay or match the darkest colour in the marble vein. Please check paint samples first.

I have a room in both. To be honest I think I bought the Antique White USA in error many years ago. It is a bit too creamy for me. I’d suggest the Natural White but buy an A4 sample from the Dulux site and move it around to see what you think.