Thanks Steve. We selected the colour from actual grout samples (not a colour chart) and yes we also had the tile with us at the time... the lighting there was pretty poor though :/ A little confused, you say that raking out joints is no big deal but then that using grout sealear is very tedious... do you mean removing old grout not so hard but applying new grout is harder? Now I'm starting to wonder if they did indeed use the wrong colour, as we had also selected another even lighter grey for the wall tiles and wondering if they used that on the floors too... and even if they did, I'm not sure what can be done about it now :/

Hi aimeelou2002, Stunning tiles! Either grout option would work. The darker will really make the tiles the feature in the room. Personally I'd probably go the softer grey however, the tiles will still pop as the light grey will still contrast against the brilliant white, but not be so dramatic as the charcoal which will appear black against the White (especially if everything else is white /muted). Good luck with your decision, and I'm sure it will be beautiful whatever you choose!

Thanks everyone for their comments! Update: husband has 'over-ruled' on this one. Forgot to mention that the vanity top will be Night Sky Ceaserstone (ie black). So he wants the dark grout. We will definitely be using mould inhibitor and ensuring everything is well sealed. It's all his fault if it looks horrible ;) Will post photos once fully complete. (I am now a little scared...)

My suggestion is first talk to the builder to see what instructions he gave the tiler as i'm sure he doesn't want a dissatisfied client. Most tilers will check with the builder before grouting especially when a colour is not specified in a contract. I would then ask if the grout could be replaced, from the looks of it it will only be a couple of hours work. There is nothing worse than having to look at something you are not happy with. I would not use the paint product as it will alway look like it is covering a mistake. White will look better. Make sure the mixer body is waterproofed or you will have a leak in your wall, the membrane should lap onto the body from the wall if it is done well. All the best.