Our design team suggest Grout colour 11, Anthracite for a neutral feel
Or to enhance the blue within the tile, colour 15 Stockholm blue is a great option.
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 3.5m².