Suggest a Grout Shade for tiles?

[wau5]

Hello Sirs, finally got to the stage where I can start laying tiles for bathroom and I need some grout for them however it's really hard to choose between the shades because there's simply no real samples anywhere to be seen, just some paint colour names on websites with 2cm large sample images...
I have 2 tiles , these small travertine mosaic ones for shower floor/niches
(I need to fill them as well, however I got no idea which is the standard colour for these to fill them out? something whiteish but not white? ivory/beige? )

and than for the rest of the bathroom walls I got these (kinda whiteish/but with hint of beige/grey spots to make it look like stone).
link to wickes: Wickes Battersea Concrete White Ceramic Wall Tile 298 x 498mm | Wickes.co.uk - http://www.wickes.co.uk/Wickes-Battersea-Concrete-White-Ceramic-Wall-Tile-298-x-498mm/p/140601
not able to post their picture.
I do not think clear white or super dark grey would really go with them? + I do not want completely white anyway since it would get dirty with time.


Any pros here could maybe give me some ideas what would you use If you had to choose grout for such tiles? Also I think I need to have for each tiles different grout since they are completely different or not?

 

[Tile Shop]

My first choice would be Limestone to blend in with the mosaic and the beige hints of the main tile.

 

[John Benton]

Limestone all the way, you'd hardly notice it was there

 

[wau5]

Thank you guys, you obviously know your stuff very well
just Went to Tilegiant and they had some samples, and the Limestone was totally the best out of all that would match what I need.

Thanks!

 

[wau5]

damn the Tilegiant is such a rip-off place, I found that someone had mentioned they have re-branded online store ( tilemagic ), checked it out and wow.. they charge 2-3x more in the store for literary everything they sell.. what the hell Some £70/m2 tiles I bought from them (just 1m2) cost there £38 ,
that tile grout costs £20 in-store, online just £10.5
metal tile beads , £20-£25 a piece in store, online from £9-£10

 

[MTiler]

Mapei have these new Keracolour Flex contemporary grout colours that may suit.

 

[Tile Shop]

OOOOOOO....... Pebble would also be a good shout then. May go with the plain tiles better?