Update DCParks_Camping.geojson

Fixed colors

Author: rangernathan

projects/national_capital_region/DCParks_Camping.geojson

@@ -25,7 +25,7 @@
         "name": "Owens Creek",
         "url": "https://www.nps.gov/locations/dc/catoctin-mountain-park-owens-creek-campground.htm",
         "park": "Catoctin Mountain Park",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -43,7 +43,7 @@
         "name": "Paw Paw Campground",
         "url": "https://www.nps.gov/locations/dc/c-o-canal-paw-paw-tunnel-campground.htm",
         "park": "Chesapeake and Ohio Canal National Historical Park",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -61,7 +61,7 @@
         "name": "Spring Gap Campground",
         "url": "https://www.nps.gov/locations/dc/c-o-canal-spring-gap-campground.htm",
         "park": "Chesapeake and Ohio Canal National Historical Park",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -79,7 +79,7 @@
         "name": "McCoy's Ferry Campground",
         "url": "https://www.nps.gov/locations/dc/c-o-canal-mccoy-s-ferry-campground.htm",
         "park": "Chesapeake and Ohio Canal National Historical Park",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -97,7 +97,7 @@
         "name": "Fifteen Mile Creek Campground",
         "url": "https://www.nps.gov/locations/dc/c-o-canal-fifteen-mile-creek.htm",
         "park": "Chesapeake and Ohio Canal National Historical Park",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -115,7 +115,7 @@
         "name": "Antietam Creek Campground",
         "url": "https://www.nps.gov/locations/dc/c-o-canal-antietam-creek-campground.htm",
         "park": "Antietam National Battlefield",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -133,7 +133,7 @@
         "name": "Oak Ridge Campground",
         "url": "https://www.nps.gov/locations/dc/prince-william-forest-park-oak-ridge-campground.htm",
         "park": "Prince William Forest Park",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },
@@ -150,7 +150,7 @@
       "properties": {
         "name": "Shenandoah National Park",
         "url": "https://www.nps.gov/shen/planyourvisit/campgrounds.htm",
-        "marker-color": "7e7e7e",
+        "marker-color": "#000000",
         "marker-size": "medium",
         "marker-symbol": "campsite"
       },