Peter wrote:
Hi,

Does anyone have any suggestions as to the best way to colour floor
tile grout, please. I do not need a huge amount and the closest colour
I can find is "sandstone" in B and Q but in a 5kg bag! There are
smaller packages but in white or grey and, ideally, I need a dark
brown or even black.

Any ideas of how to colour these, please?

Many thanks,

Peter

Cement dyes should work, or soot. You could probably use a powder paint
from an art shop