Since i did an inset cubby with the same penny hex the grey seemed like the best option.
Black and white hex tile with gray grout.
Up until the mid 80 s there were only three grouts white unsanded for wall tile and grey sanded or white sanded for floors.
You can highlight the shower or bathtub area with hexagon tiles if the rest of the tiles aren t hex.
Clad in black hexagon floor tiles accented with white grout this well appointed mudroom features a river rock boots tray placed beneath a built in wood bench fixed against a white shiplap backsplash fitted with oil rubbed bronze hooks mounted under white overhead shelves stuffed with wicker baskets.
Make the zone stand out using some contrasting grout for example black tiles with white grout.
If they are you can use some different pattern size or color.
It really makes the white hex tile pop.
White and green shared boys bathroom boasts serena lily dip dyed stools placed on carrera marble hex floor tiles under a window dressed in a green and white geometric roman shade lit by a nickel sconce mounted on white subway wall tiles with gray grout fixed beside a chrome framed vanity mirror.
My other recommendation is to at least consider the other extreme a charcoal dark dark gray or light black or even a black grout.