I agree with everything said so far. Would suggest you get built in book shelvers on both sides of fireplace, lift tv into a slot it fits perfectly into (make sure you have power on both sides). Then it will disappear more rather than fight with fireplace as focal point. I am always disappointed with mirrors over fireplaces, they become dark, are to high to reflect much. Plus then you have three rectangles fighting for center stage. I'd say very colorful artwork instead. Wonder if you can reorient tv where the big chairs are so both tv and fireplace are addressed? Color, maybe you should decide on furniture first?

I am afraid blur will be limiting. I like the idea of gray, then in bring in the blue with accents. I would remove the lone cabinet on the left. Is it possible for you to build a pantry? A place to store the freezer is my goal with that. Where is your refrigerator? Just trying to get the lay of the land. A pantry would not be any deeper than the cabinet already there and with a sliding door you free up lots of space. Build it the width you need to fit the freezer and then about a 12 -18inch wide shelf space for boxed items, cereal etc. Leave enough room to fit your refrigerator next to it...about 30 -32 inches is needed. It looks like you have nearly 7 feet to play with. I know this pic is a washer/dryer, but just to give you the feel.

Thank you for your suggestions and ideas! I love some of the more daring/colourful ideas, but I don't think I'm, personally, bold enough to go with such a contemporary look. I'm going to stick to a traditional/modern style and use large (4" x 8") white subway tiles and dark grey grout. I'm thinking of using a dark grey paint around the kitchen walls and then a lighter shade around the rest of the room, with maybe the dark grey on the wall behind the TV too. Will be a few more weeks before that's all done, but I'll post a picture when I eventually get there. Thanks again!

Ive just bought a new ivory white kitchen black counter and light grey walls, need ideas on colour for my backsplash tiles please