Our design team suggest Grout colour 11, Anthracite to create a textural slab appearance.
Or to enhance the shape of the tile use colour 09. mid- grey.
Recommended Grout Joints - We have assumed that your substrate has a perfectly flat and plumb surface, please check with your tiler.
3mm grout joint. Based on this joint size, 1 bag of grout would cover 2.6m².