The best paint colour for interior walls depends upon the location of the wall however shades of white and grey are the most commonly used wall colours in a home.

Living Room: The definite colour that you see in most homes in the living and family room area are shades of white and beige. The trims should be of a different colour than the walls. 

You can also opt for one of the wall in the living area to be of a different/ darker colour contrasting with the light colour of the remaining walls. This would add some colour and play to your interior living space. 

Bedroom: If you want to add colour to your bedrooms, consider using shades of grey colour. Grey goes well with wood finish and it could contrast well with your bedroom furniture and night stands. 

Children’s bedroom: Pink and blue are colours that can be added to a children’s room although lemon makes the cut as well. Opt for one wall to be creative in the children’s bedroom. Usually bright colours work well for children, specially if they are of a smallish age. Variations of blue could be used on one or on all walls. 

Bathroom: The colour in your bathroom should be planned around your tiles and there should not be much contrast between the tile colour and the wall colour. Some bathrooms have tile on all four walls and this leaves very little space for paint. I have seen a combination of grey tiles and white wall colour that works well. Darker tiles should have a lighter wall colour l, the only situation where the contrast works well. 

Garage: Consider shades of yellow in your garage as lighter shades make the garage look bigger. Some new builders prefer to leave the garage walls unpainted and this can give an unfinished or rugged look.

Overall, lighter wall colours in the living and dining area and darker colours in the best works well for painting the inter of your home.