I'm assuming that walnut oak is a dark brown? What is your preferred design style and colors? Let's get those walls painted!

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 Pooja, there are multiple ways to make the room bohemian chic... a lot depends on the other elements in the room. Above are some very pretty combinations and rooms that are bohemian using teal. You could get in touch if you would to get it designed properl.

Keep things cool Cooler shades such as grey and blue help walls recede, making the room feel more spacious and light. Bring home the sunshine Light but warm colours such as terracotta or yellow can mimic sunshine and make a space feel bright and airy. Pale ceilings Keep the ceilings in a light colour to make the room appear larger and lighter. While white is your safest bet, you can opt for mint or sage green for a pop of colour.