Simple color, blue color
Atlist is the easy way to create maps with multiple markers.
[{"featureType":"road.arterial","elementType":"geometry.stroke","stylers":[{"color":"#ff0013"}]},{"featureType":"road.local","elementType":"geometry.stroke","stylers":[{"color":"#d39345"}]},{"featureType":"water","elementType":"all","stylers":[{"color":"#311c74"}]}]