Option 4. I would not have more than 2 different cabinet finishes. Darker, grounded look for the base and island, with lighter, airier look for the uppers would balance the room.

gate & railing black front wall dorder dark i.e. coffee colur and rest match light biscute colour

I select these colours with the help of other houzzer and expert professional advice and discussion. I also got help from colour paint catalogue. Is it looking good or not? Is there any problem with these colours and their combination. Please guide me in this regard.

Hi Nandini, White would be an apt option for your space but you can do one thing, Accentuate some walls with one of the fine dark grey's while some wall can be muted to white. In that way your purpose of letting the space being minimal and open at the same time will be fulfilled. You can also try agate or antwerp blue for accentuating. regards