Changing grout color around plank tile

1_grout_colorant
This plank floor was in a brand new home and the builder did not allow the homeowner to choose light colored, narrow grout joints.  The homeowner was worried the grout would darken and take on a grid-like appearance over time.  The best option was to lighten the grout color by applying an epoxy-based grout colorant which also resists staining.