How to have a basemap without Country borders

[QuentinPrigent]

Hello Everyone ! 

I'm quite new in the use of ARCGIS. 

For a project I need a basemap, like the dark gray one, but without any information, like roads, country borders etc. 

Is there an existing basemap for that, and if not, how can I delete these information from an existing basemap ?

thank you very much in Advance !!!

Quentin

[BarryNorthey]

You can create a custom basemap in a couple of ways. This tutorial explains how and where to get the data you might need. https://geospatialtraining.com/tutorial-creating-new-basemaps-with-arcgis-pro/

Here is an example. You can apply your preferred colors and set the outline color of the countries to No Color to remove boundaries.

[Robert_LeClair]

Using the ArcGIS Vector Tile Style Editor, you can create your own custom basemap without the country boundaries or other layers and then save that basemap to your Portal.  There's a tutorial here - https://developers.arcgis.com/documentation/mapping-apis-and-services/tools/vector-tile-style-editor... - that you can learn how to do this.