the tropicana has a golden look, so I would probably look at a color like that... It depends on your likes, I prefer a VERY small grout line, and generally choose a grout color similar to the background color of the tile. I don't like a stark contrast from the tile and grout, but others like a definite grout outline pattern to show... it's a personal decision.

this is a great example of what grout does to the overall look of the tile.

It's merely an example.

Looks like a Taupey Grayish color grout would be a nice option for the Tropicana, the way the ends of the tiles are burnished.

Your local tile store might have a sample board that is grouted.

From the photo, the Tropicana colorway looks like it might be quite gold/mustard, so it wouldn't be my first choice.

It does seem very gold in the photo, and the sample board that I got from my tile store wasn't really big enough for me to get a good idea of how it would look. I ended up ordering a whole box which I laid out to make a decision. While there are some very creamy pieces, the tile as a whole isn't as mustard-y as in this picture. I decided to order extra tiles and sort through each box. Any really gold ones can go under cabinets. I agree with the first poster in that I also don't really like a super distinct grout. I'm hoping to find someone that has actually installed this tile. Thank you to everyone for taking the time to comment!

Can't help with the grout color, but that's a lot of grout for a floor. I am dealing with it now (not doing well) as what was a lovely soft off white/gray is now charcoal black. And I clean and steam my floors. So make sure you use:

For the best stain resistance on floors, choose epoxy grout, which is virtually waterproof and non-porous, or urethane grout, known for being easy to clean and moisture-resistant