Our design team suggest you use the following grout colours: -
Grout colour 07, Grey for practical grey tones.
Grout colour 03 Pearl, to match the tile.
Grout colour 02, Warm White, to define the tile.
Recommended Grout Joints - We have assumed that your substrate has a perfectly flat and plumb surface, please check with your tiler.
4mm grout joint. Based on this joint size, 1 bag of grout would cover 2m².