I would actually try a glossy black, or perhaps a japan black stain with teal scatter cushions over your neutral cushion. Glossy black looks great against blues and green, its a simple classy look and its easy to change it up with scatter cushions should you decide to use it elsewhere in the house.

Hi Alyaa just confirming a few things for you. Definitely pull the sofa and pair of chairs away from the walls approx. 20 cm. The current trend with rugs is to run them 20 to 30 cm under the front legs of the main seating so any rug needs to be much bigger. I like your use of texture and self pattern in the current one so a new one that's similar just larger would be good. Your colourful, patterned scatter cushions are fine for adding some pattern as well as colour but I think you need a block coloured one in your green tone to sit in between each pair. See Oskuee's scatter suggestions above. I like the block coloured green one, second from the top. A large piece of art as suggested by Gallery 360, positioned to the left of the sofa that is against the 3 tall narrow windows will add more personality. On the side table, a table lamp would add ambience. Either of Oskuee's drum pendant light fittings would be perfect. Avoid any light fitting that is mid-century modern in style as this does not suit your design style. On the coffee table, create a single grouping (vignette) of three pieces of varying heights rather than four separate pieces that crowd the top. Lastly if you were able to get a second matching side table for the opposite corner between the two sofas that would be great, as I would describe your style as modern classic and pairs work well.

Are you combining a good way of sitting with a good design? If yes, arm rests are nice, when a dinner takes longer than 1 hr or so. It helps if there is a cushion available that people want to use where the back of the chair is rounded (and people prefer to sit upright). Under no circumstance should the seat slope backwards. The sitting level should be flat - no slope. The cushion can carry a lot of design and colour suitable to the environment. I love simple chairs .... and it helps not to put too many chairs around the table.... (unless you have a big family), have two chairs against the wall somewhere close. Sit on chairs before you buy them. (And a personal thing: I LOVE different chairs. Never more than a pair of 1 design) - like in the picture with the2 green armchairs and the bench. That is just great and suits different situations and guests. (To siriuskey...... I would sit on the bench)

Any ideas on where I can find lime green high back chair cushions for our outdoor dining set similar to this?