I love your outside entertaining area. It does need a color that would complement but give the area a focal point. I like the darker red,orange colors you may find in natural. You could dress up the table with accessories and place cushions in a complimentary color on the benches. Colored potting containers would also bring it all together. I like the uplighting here in the photo you could place along the back fence to add drama. Your area reminds me of Modern mediterranean landscaping.

I would go with a gold or yellow ... of course I happen to love teal/ turquoise and gold/ yellow together. Something in variations on the photos below... maybe some pink accents if you have a girl or lime green or blue accents if you have a boy.

My inclination is something with colour and with a connection to elements already in the room. A dark timber frame and a deep coloured strong image, wide enough to link across the chairs and not seem squeezed between them. Here's a random red-toned image from the internet that I have stretched into a dark wood frame. The hues link to the cushions without matching tightly and add richness and warmth.

I am blown away from down under by the help that you all have freely given .... thank you sooo much indeed. who would have thought after a year of anguish that I would be put out of my misery! If I do go for the atlantic for chairs I will bring in plum touches and vice versa. Will now need to go and find some plum that closely aligns with your suggestions. Thanks for saying we can keep table! It is a good solid NZ made oak one ... chairs were all the rage back about 18 years ago! Now need to go! I will put up a pic of a rug that was quite nice but rather expensive so ... might be in an hour or so. Thank you so much again.