For each bathroom choose a neutral color that U see in the tile Here is how to find the perfect wall paint "match" http://www.lindaholtinteriors.com/2011/07/testing-wall-color-101/

Dear Balaji, Tried and tested colour combinations that make wood work stand out will be in contrast to dark brown. You can choose reflective colours like pale yellow, off white.. In Berger Paints you could check out 3P1844 Sauvignon White, 3P1854 Fresh Linen, 7P0185 Fabulous White. Also, the website offers Virtual Colour Painter which you can use by uploading your room photo. Best wishes and regards, Ar. Avni Gor

do you have the interior designing and finishes finalized? as I mentioned earlier, everything in the room has to be tied together. I cannot give you a colour for the arch if it is going to clash with the window frame job, or the cabinets or the wood. In case you don't, I can help you with that. we offer consulting services, which is basically this, the help on Houzz, in a lot more detail. If you are interested, please connect with me on 9921364291 miloni The Yellow Cushion

Either, you can paint all the walls with light grey or white colour. Or, highlight one wall with light grey colour and rest of the walls can be white.