Hi pankaj. Some lovely ideas above. Is that a door at the end of the passage? It strikes me, especially if you want to make the passage all white, that you might be able to give that door a special treatment to bring some drama to the end of the passage. That draws the attention to the door and away from the passage itself. You could just paint it a vivid colour. I think we tend to let our interior doors remain very plain and boring, when there is no good reason for that to be a rule. The one below would need some sort of backing for privacy, I guess, but I think to put metalwork on a door is a great idea that you could adapt in various ways. (Be aware of the dusting, though! Outside the rain will wash things clean, but not inside.) Also have a look at http://www.lushome.com/11-door-decorating-ideas-create-modern-interior-doors/58940 for some creative paint ideas -- I can't get those pictures to copy. I like the first one on that site. It's simple and geometric, and could very easily be adapted without hurting the budget.

On your paint problem I can't be much help. This usually happens because of damp -- please get a damp expert to make sure that there isn't any damp lurking in your walls. I had this once when I had pipes leaking inside the walls. I didn't know that. The other alternative is something like painting before the plaster is dry or some kind of chemical mismatch. I do know you will have to scrape all the mucky powdery stuff away and start again, at least on those areas. Don't try to seal and prime and repaint until you know exactly what the problem is and how to fix it.

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.

@Rock Doc: Are you addressing this to me? I haven't actually bought these tiles yet - when I do, I will definitely be going for the handmade ones. They're a work of art and irreplaceable in my opinion. However, there are also screen-printed tiles available in the market in more or less the same patterns; the workmanship is of course different, but you get them cheaper, and they're also more easily available. You could give that a shot. I'd recommend Aakaar Flooring Solutions - they're here on Houzz and are able to provide both the above-mentioned types.