Perfectly light for all kind of online based web mapping applications. Credit to TVN (tvnweather.com) for inspiration.
[{"featureType":"all","elementType":"all","stylers":[{"saturation":"-90"}]},{"featureType":"poi","elementType":"labels","stylers":[{"visibility":"off"}]},{"featureType":"road","elementType":"geometry","stylers":[{"lightness":10}]},{"featureType":"water","elementType":"all","stylers":[{"color":"#b8b8b8"}]}]