Changing the spawn camera's clearColor

How would I change the color of the ClearColor of my camera once it has been created. Here is the sample code

FirstPersonMovement.prototype._createCamera = function () {
    // If user hasn't assigned a camera, create a new one = new pc.Entity();"First Person Camera");"camera");
    this.entity.addChild(;, 0.5, 0);

    //Below is the process I'm trying to use. Essentially I want to make the clearColor White
    var white = new pc.Vec4(255,255,255,255); = white;