Google Map dark theme

map.js

map = new google.maps.Map(document.getElementById('gmaps'), {
    zoom: 5,
    center: {
        lat: 43,
        lng: 12
    },
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    styles: [{
        "stylers": [{
            "hue": "#ff1a00"
        }, {
            "invert_lightness": true
        }, {
            "saturation": -100
        }, {
            "lightness": 33
        }, {
            "gamma": 0.5
        }]
    }, {
        "featureType": "water",
        "elementType": "geometry",
        "stylers": [{
            "color": "#2D333C"
        }]
    }]
});