Here's some photos with grey sofas for some inspiration.

Thank you for the suggestions. I decided to go with an orange and blue colour scheme for the decor.

Something like this -

I picked up this rug over the weekend. The rug is quite big so it's actually wider than the sofa.

Do I need to centre the sofa, TV and coffee table with the rug?

How can I style the coffee table? I will be removing the coffee table cover - it's just there in the mean time.

Thank you once again for your help & suggestions! :)

Don't overdo objects on your coffee table. I see you have cream in that cushion, don't use any more, as your white furniture is very "modern". Getting back to objects, keep them practical. Maybe a tray, something attractive to read, and another item of your choice. Groups of odd numbers work best, preferably three, you don't want clutter.

https://www.houzz.com.au/magazine/guide-to-creating-a-beautifully-styled-coffee-table-stsetivw-vs~34758028

The finishing touch is artwork! Also a great way to bring the outdoors in, and add a splash of colour!

www.dylanfox.com.au

What do you think of this one Dylan ;)

http://www.wikiart.org/en/winslow-homer/fox-hunt

I agree that many of Dylan's great photos have the blue and orange you are seeking. Just stunning.

That's why I start with art, rug or expensive existing curtains. I take my colours from one of those.

Hi, why not carry some of those colours into some fantastic artwork for the room? These two contemporary limited edition prints by Greg MacLaughlin are very affordable. Each is available in a variety of sizes and compliment the beautiful tones introduced through the cushions while keeping with the more geometric/hard line elements of the rugs, table and sofa. There are many more options on our website and we'd be happy to help you curate a selection perfect for the room.

Since this is a rental, we can't hang anything on the wall :( Don't really know how I can hang artworks on the wall without nails. So sadly the walls have to be bare which is bothering me so much!

There are plenty of ways to hang things on walls without nails,that won't ruin walls or paintwork. Drop into a large hardware store and have a look.

Weigh your items, write it down and take it with you. I've used two maximum weight Commander hooks for one mirror when renting. Anything with glass or mounted on thick wood will weigh more.

Cheekychubbychicky

I agree with oskuee, definitely don't have razors lying about!

@chubbychicky These are from Etsy :)

https://www.etsy.com/au/listing/121053142/turquoise-and-orange-decorative-zippered?ref=market

Would hanging a mirror above the sofa work? Or would it look too cluttered?

For a sofa, you need a mirror 3/4 the length of it. That's a lot to ask of your Commander hooks. Try a smaller mirror near the front door instead to check yourself before you leave.

What do you guys think of the floor lamp version of this lamp from ikea?

http://www.ikea.com/au/en/catalog/products/50281413/

It would help to soften the room to have more fabric, but what base do you choose for that shade?

Ikea doesn't seem to have too many choice with the lamp base - http://www.ikea.com/au/en/catalog/categories/departments/living_room/10805/

I'm thinking just a basic black base?

I just found this pic of a lamp on another houzz forum. It's so beautiful but I have no idea where I would be able to find it.

https://www.houzz.com.au/photos/contemporary-living-room-contemporary-living-room-new-york-phvw-vp~4297466

I always thought about throwing away the storage cube cos I didn't think it really suited the room or had any purpose there. But after @oskuee's comment, I'm thinking of painting it and then turning it around. Would black be the best colour though? And I can add orange & blue boxes in just 2 of them?

The lamp is called C-U C-Me Arc Lamp. You'd be looking at upwards of $1500 to purchase in Australia. I actually don't think it would be that difficult to recreate the look....

A mirror would look fine over the sofa but I think it's too risky on temporary hooks. You wouldn't want it coming down on anyone sitting on the sofa. Approach the landlord and see if you can actually put nails and screws in the wall so long as you patch & paint the holes at end of lease. It wont hurt to ask.

Check out Apartment Therapy for tips on renting and putting up wall decor or alternative ways to display items.

What a beautiful coffee table. Any modern artwork that you like would look great, but don't skimp on the size of it, or alternatively lots of your favourite photos/pictures framed in one sort of block area would also be great. We have a beautiful black and brass nautilus on our coffee table - if I could load a photo I would. Just go shopping and wait until you find something you can't live without - don't hurry, you'll find it. Good luck and all the best in your new home.

What an improvement Theophil! And all that light flooding in really lifts the room also.

You could experiment with increasing the size of that artwork by mounting it on a backdrop piece. Something like a larger artists canvas (the flat kind, not box frame) and painting it or covering in complimentary fabric. Or use a wood panel, left raw or paint/cover it.

That is actually an artist panel, but I don't see why something from hardware store wouldn't work.

You could also just tack decorative paper, wallpaper, fabric behind it.

But nothing too tacky. ;)

What you're doing is great, try and get a little more balance. The photos you have on the shelves beside your sofa (with maybe a few more of them) would be great on the wall with your painting to maybe even frame the picture. Try your candlesticks on your dining table. Have you tried the shelves on the other side of the sofa - I love moving furniture around. At the moment your eye is drawn to the lower part of your room instead of getting the overall effect which will end up great. Just keep fiddling.