How to change color of a layer in openlayers?

http://ift.tt/1A5QrDX

this is my website for test.

I add two layers in openlayers.

And I want to change color in one of two layers.

var myStyle = new OpenLayers.Style({fill: true,fillColor: "#ff0000"});
var BounderyshpLayer = new OpenLayers.Layer.Vector({projection: new OpenLayers.Projection('EPSG:3826'),style: myStyle});

why is it not work!?