
The tiles are cut there because the whole wall was done and needed the right cuts at the plug pointsCurved ball time :-
Black and Grey !!I
You'll need black silicone anyway to do the join between your worktop and the bottom of the upstand.
I'd go for grey GROUT on the top of the upstand for 2 reasons:
1. As @foxhole pointed out - you're not going to get a crisp sharp silicone line along those tiles,
2. The colour has to be either the exact shade of the tile, or the grout. As you already have the grout, ( and therefore the colour) why not just use that ?
P.s. Is there a reason the first row of tiles along the Upstand are all cut ?
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