Change color of geojson node

Hello there,

I am new to GeoJson and just out here, figuring out the basic steps. I managed to create a single Point which has a titel, description and coordinates. So far so good. Now I want to change the color of the dot. Please feel free to take a look at the GeoJson down below.

   {
     "type": "FeatureCollection",
     "features": 
     [
      {
        "type": "Feature",
        "properties": {
          "name": "name",
          "description": "cription"
      },
     "geometry": 
      {
        "coordinates": 
         [
          -38.07457315977632,
          40.08010404958037
         ],
        "type": "Point"
      }
     }
    ]
  }

I tried to find a documentation but failed on this. Also tried to add "color": "#114558" under description, but that was a missguess. Instead of fillig the correct field, it added another field to the interface.

I hope someone in this community can help me to change the color of that node.

Sincerly Deborah

Edit: I want to Use the GeoJson file to import data to UMap