Feature request: Outlines or gradients at the borders

[owenstone]

After guessing two countries that share a border, they may have the same or similar colors, and I can no longer see the shape of each country. I'd like to see the country borders, ideally as an option or a toggle.

It should be subtle. I appreciate how nice it looks now with contiguous countries filled in, so I would want the borders displayed lightly lined in a similar color or shaded, e.g. as a gradient.

If this isn't possible because the shapes would be super janky, or they would chatter when zooming, then don't do it (yet).

[owenstone]

I discovered the existing feature Rainbow color mode that helps show the country boundaries. This issue can be closed at your discretion.

[caphector]

When not playing on rainbow mode it can be hard to tell where a new country popped in. Some form of an outline or edge indicator would be appreciated.