thank you for the options people... i was trying to think a bit of a contrast flooring .... slightly more browner ... ?? What say all of you ? also need the floor to have some texturing dont like absolutely smooth wood will make it feel like paper...

Instead of the solid grey, you can go for sketches in grey with flashes of mustard/ yellow. Or, look up these links for wallpaper ideas https://goo.gl/images/OrCtY1 https://goo.gl/images/0ZpAmU

In civil engineering this condition is known as efflorescence this condition occurs due to capillary action of water in brick in which water contains diffrent salts comes on surface through voids of brick and evaporates and salt rest on surface as shown in image this salts may be harmful or not this depends on type and chemistry of salts generally it is not harmful

Hi not clear about furniture color combination...we have to think about over all color combination... if you like grey color go with lighter shade like Gentle grey...here attaching some reference images take one combination.