Pictures attached for 3 bathrooms, first 2 are from same bath

Hello - do you mean paint for the walls? I have seen many bathrooms in other countries, not just India, that have a combination of paint/tiles so don't understand why this would be an exception

You can use natural stone like marble for floor but do not use granite for floor at all as it is very slippery when wet. As for tiles do not go for glazed vitrified tiles for the floor for the same reason. ( floor becomes slippery once wet and may cause mishap) Go for ceramic anti skid tiles that are specially meant for bathroom floor. For wall tiles you can use whatever you like and then decide over the matching anti skid floor tile/ marble. Double charged vitrified tiles are usually used for flooring in rest of the house.

Hello April, It's an old wood floor and each slab of wood accepts the stains differently so getting exact match is very difficult. Sanding, staining and repolishing the existing flooring to match the new floor is a likely solution to your dilemma. Its a messy and time taking procedure though. Easier way out would be to check with original vendor if he still sells the same variety. Or request them to visit with some other matching samples. Thanks, Nitin CORNERSTONE DESIGNS Bangalore.