1
Yes, it is possible. There is a very useful tool for this here (link) where you can change what you want and then export a JSON that you can pass to the object options
from the Google Maps Builder. An example:
styles: [{
"stylers": [{
"hue": "#ccff00"
}, {
"saturation": -100
}]
}],
jsFiddle: http://jsfiddle.net/gnqogh6s/
Official documentation for configuring styles is found here (link).
Look, here’s more about that.
– Ivan Ferrer