Tumbled marble might look out of place if it's the only natural texture in the room. If you want to keep a similar contemporary mosaic, then 2 things for you; Firstly, measure for yourself the actual mosaic sheet - don't take the written dimensions as gospel. Secondly, once you have a couple of favourites in mind, take a look at tile trims to incorporate with the mosaic. Remember, you can cut the mosaic sheets into thinner strips. Trim could be square edge tube style trims or even L shape angle in either aluminium or chrome and can be used at the sides of your mosaic or, in the case of the angle trim, used in multiple vertical lines running through the mosaic. Knowing the dimensions you have to play with will make it easier to design a solution that keeps grout width to appropriate size of 2-3mm for wall tiles.

Is that a timber floor I can see in the pictures? My thoughts would be – play up the timber features. Nothing better than a simple clean palette of white, with natural finish timbers (floors and the inside of your window frames). If this can be done, I suggest painting the window architraves white (to match the walls). No matter what you do, painting the window architraves black (as you ask) would be too much... Best of luck!

Ania, can you post photos when it is finished. It will be good to see those colours combined. I also love that inspiration photo and have it saved. I don't know what particular thing makes that bathroom stand out but it is beautiful. I want those exact same colours in my bathroom but a too scared to use timber tiles as I am scared they will date so am bringing in timber via accessories such as picture frames (I think). What is the grey tile in your photo and where is it from...it is very nice.

There are never right and wrong answers to this Cath....it can also become actually more confusing when you're not 100% and you get various/conflicting additional advice/opinions and then have to filter/distill the choices/options/opinions down to a final decision........when all else fails, trust your instinct/heart...you should "know" when it feels right....people sometimes ask why/how have I made a particular decision or move one way or the other, and sometimes my answer is simply "because it feels better that way than the other" - when it comes to design sometimes your "technical head" is your enemy ;)....sure the bench top material could look awesome as a splashback, but for you specifically the blue tile may be the better option, where it started and what you are drawn to......have you considered options such as a grey/earthy bench top? I've seen that done recently on a job (not mine btw) that combined with blue splashback tiles that you wouldn't expect to work on their own, but for what they were going for it was a perfect complimentary match.......when you get stuck with the decisions/palette resolution, sometimes freeing up and considering a lateral option is the answer to moving forward getting the balance and breathing space required