best dark grey grout

[simonjay]

I know you are wary of UCP but their Anthracite is by far my favourite dark grey.

Have you got a picture of white tiles with UCP Anthracite by any chance ?

 

[simonjay]

Ardex cast iron like nice and dark, and dark enough that if it dries slightly lighter I would not be worried.
And the flex-fs has plenty of working time.
The picture of BAL smoke looks darker than the colour stick in Topps.