The photo below is my suggestion for colour of floor. Furniture should be darker - similar to below. For the rug - choose one colour from the artwork and find a similar coloured rug. Don't put a mantle over the fireplace - it could be a health hazard - bumps and bruises. Blinds - unless you want them to make a statement I think white - to match window frames would be fine.

I used to have tiled floors at the old place ..the whole downstairs was tiled ( lounge, study, living room , kitchen, laundry) terracotta ones..not cold at all contrary to what people think .. the kids loved riding their trikes around the house as it was massive open living space 36 squares in all. we had a wool rug where the living area was so kids can lounge around.. I find tiles are easier to maintain than floor boards.A quick vacuum and mop is all it needed and it hid the dirt well..whereas floor boards collects dust and hair etc.. Timber floorboards are nice to look at..the floating /laminate looks cheap and nasty I'd rather tiles instead.

It really depends on your personal preference. I personally think that a splash back that is different to the marble island would be suitable! Have you thought about frosted glass or even a tinted mirror splash back? They do add value and can also be a great focal point in any kitchen. :-)

Depending on your budget I’d paint the cabinetry, replacing the doors if you can afford to and just painting them if the budget is tight. Just a thought, maybe it’s possible to fill that detailing in the doors to make them appear flat once painted. Not sure if it’s possible. It’d be a shit of a job but then you’d have solid wooden doors. And new handles. The same with the tiles. Paint is a cheaper option. New tiles would give a better finish. Remove the window valance. Perhaps resurface the benchtop with a product like rustoleum. Replacing the oyster light with something more contemporary. Open shelving can look great and lighten a space but think about whether this compromises your storage capacity. Everything will be on show. I think if you paint the cabinets then the floor won’t look so bad as there will be separation between the similarly coloured floor and ceiling. Cork is great in kitchens as it’s soft so it’s easy on your legs and back and forgiving if you drop things. It’s also making a comeback, as are timber ceilings. I would choose soft flooring for a kitchen over hard flooring. Kitchen floor tiles are a pet hate of mine. In my next build we’re putting rubber or cork in the kitchen. You’d struggle to put a double oven next to the fridge as it’s a thoroughfare. You’d also lose your pantry. Is two side by side 60cm ovens a possibility where your oven currently is?