HO is complaining. I rarely ever use cementious grout any more. I suspect the tap water is high in calcium and/or my rinse bucket had too much calcium.
I am going to regrout over top- grout lines are a little depressed relative to the tile. Not unusual, I didn't wipe too much away, but I am going to try to keep it almost flush with tile as the tile edges are quite sharp.
I did a test today, and with the efflorescence cleaner from mapei and the aqua mix premium stone sealer/color enhancer it gets it matching pretty well. Almost a little darker with the sealer, as it darkens the color.
I think I am going to mix with distilled water or mapei's grout sealer product that you can use with grout. And then make sure my rinse bucket is clean.
The water was "clean" but not fresh. There was a bit of thin set sludge at the bottom which probably would have upped the calcium content as well.
After this experience I will be happy to go back to epoxy grout. Despite the pita factor I prefer it. Especially for showers and bathrooms.