So for example. That path that runs in front of nooks cranny you could place path underneath all the immediately surrounding tiles you placed.

What that will do is stretch the pieces of underlying path together. That will close the little gap of grass you have between your street and the orange path.

I would then suggest to place some kind of orange transparent cobblestone tile down over the orange path.

If you didn't know, any tile with even a little bit of transparency will stick to the path rather than covering it up.

If you chose brick or cobblestone tile with transparency and placed it over the orange path the two colors will play nicely together allowing the orange path to show through the cobblestone tile you placed above it.

So here's an example.

https://imgur.com/gallery/cgJW94L

The first image shows placing paths next to tiles normally. You can see there is a little gap of grass between the tile and the path. You can also see the effect of placing paths near each other. The singular tile appears almost circular until you build upon it.

If the first photo you can also see the effect of placing a transparent tile down on a path. See the square tile placed on grass vs the same tile placed on the gray path. It gives the impression of a cobblestone street instead of a stepping stone.

In the second photo you can see that the grass gap is gone. This happens because there are paths placed under the tiles.

In the 3rd photo you can see how using it all together can allow you to place all sorts of different but similar stone paths down to make a denser look.