Google maps theme

I guess u might added map theme, if added please remove or change theme

    //Custom Theme
    MapStyleOptions style = MapStyleOptions.loadRawResourceStyle(this.context, R.raw.my_map_style);
    map.setMapStyle(style);

Changing theme Please refer here.

Create theme from here.

Rewrite in style json file. try to different color code change.

java code

MapStyleOptions mapStyleOptions = MapStyleOptions.loadRawResourceStyle(activity, 
R.raw.map_style);
googleMap.setMapStyle(mapStyleOptions);

raw/map_style.json file

 [
  {
    "featureType": "administrative",
    "elementType": "all",
    "stylers": [
      {
        "saturation": "40"
      },
      {
        "lightness": "5"
      }
    ]
  },
  {
    "featureType": "administrative",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "administrative",
    "elementType": "labels.text",
    "stylers": [
      {
        "hue": "#ff0000"
      },
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "administrative",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#000000"
      }
    ]
  },
  {
    "featureType": "administrative.locality",
    "elementType": "labels.text",
    "stylers": [
      {
        "visibility": "simplified"
      },
      {
        "color": "#cb561a"
      }
    ]
  },
  {
    "featureType": "administrative.locality",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#858585"
      }
    ]
  },
  {
    "featureType": "administrative.neighborhood",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "administrative.neighborhood",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "color": "#858585"
      }
    ]
  },
  {
    "featureType": "administrative.neighborhood",
    "elementType": "labels.icon",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "color": "#00467f"
      }
    ]
  },
  {
    "featureType": "administrative.land_parcel",
    "elementType": "all",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "administrative.land_parcel",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "administrative.land_parcel",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#a8a8a8"
      }
    ]
  },
  {
    "featureType": "landscape",
    "elementType": "all",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "hue": "#ffc800"
      }
    ]
  },
  {
    "featureType": "landscape.man_made",
    "elementType": "all",
    "stylers": [
      {
        "hue": "#ffc800"
      },
      {
        "saturation": "25"
      },
      {
        "lightness": "42"
      }
    ]
  },
  {
    "featureType": "landscape.man_made",
    "elementType": "geometry",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "lightness": "8"
      },
      {
        "gamma": "0.75"
      },
      {
        "saturation": "-6"
      },
      {
        "hue": "#ffc600"
      }
    ]
  },
  {
    "featureType": "landscape.man_made",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "landscape.man_made",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "weight": "1.77"
      }
    ]
  },
  {
    "featureType": "poi",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "poi",
    "elementType": "labels.text",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "poi",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#aeaeae"
      },
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "poi.park",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "color": "#8bd188"
      },
      {
        "lightness": "41"
      }
    ]
  },
  {
    "featureType": "poi.park",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#949595"
      },
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "all",
    "stylers": [
      {
        "saturation": -100
      },
      {
        "lightness": 45
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "visibility": "on"
      },
      {
        "hue": "#ff0000"
      }
    ]
  },
  {
    "featureType": "road",
    "elementType": "labels.text.fill",
    "stylers": [
      {
        "color": "#686868"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "all",
    "stylers": [
      {
        "visibility": "simplified"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "color": "#ffffff"
      }
    ]
  },
  {
    "featureType": "road.highway",
    "elementType": "geometry.stroke",
    "stylers": [
      {
        "weight": "1.03"
      }
    ]
  },
  {
    "featureType": "road.arterial",
    "elementType": "labels.icon",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "transit",
    "elementType": "all",
    "stylers": [
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "transit",
    "elementType": "labels",
    "stylers": [
      {
        "visibility": "simplified"
      }
    ]
  },
  {
    "featureType": "water",
    "elementType": "all",
    "stylers": [
      {
        "color": "#b3e9ff"
      },
      {
        "visibility": "on"
      }
    ]
  },
  {
    "featureType": "water",
    "elementType": "geometry.fill",
    "stylers": [
      {
        "saturation": "-35"
      },
      {
        "color": "#b6e0f3"
      }
    ]
  },
  {
    "featureType": "water",
    "elementType": "labels.icon",
    "stylers": [
      {
        "color": "#86c1ea"
      }
    ]
  }
]

you can use Style JSON file. Here i have attached sample json. You can download and apply with your project.

try {
     boolean success = mMap.setMapStyle(
                    MapStyleOptions.loadRawResourceStyle(
                            this, R.raw.maps_style));

     // mMap : It is the object of a map. 

     if (!success) {
         Log.e("tag", "Style parsing failed.");
        }
 } catch (Resources.NotFoundException e) {
            Log.e("tag", "Can't find style. :" + e);
 }

You can take style from google.developer website too. Thanks hope this will help you.