ng-repeat set a random color for each row

i'm trying to set a random background color from an array in each element in a ng-repeat. This is a simple fiddle i made:

http://ift.tt/1HaHMVw

As you can see, my problem is i can't set the color in each "row" but it's set in all rows the same. I can't understand how fix that. I also tried using an id="$index" but not works. Here's some code:

<div ng-app="myApp" ng-controller="dummy">
    <div ng-repeat="customer in customerData" class="col-sm-3">
        <div ng-init="getRandomColor()" class="contact-box" ng-style="{background: bgColor}">&nbsp; {{customer.name}} got: {{customer.color}}</div>
    </div>
</div>


angular.module('myApp', ['ngSanitize'])
    .controller('dummy', ['$scope', function ($scope) {

        $scope.doc_classes_colors = [
             "#339E42",
             "#039BE5",
             "#EF6C00",
             "#A1887F",
             "#607D8B",
             "#039BE5",
             "#009688",
             "#536DFE",
             "#AB47BC",
             "#E53935",
             "#3F51B5"
        ];
        $scope.bgColor = "#339E42";
    $scope.getRandomColor = function () {
$scope.bgColor = $scope.doc_classes_colors[Math.floor(Math.random() * $scope.doc_classes_colors.length)];
    };

    $scope.customerData = [{
        name: "Mike"
    }, {
        name: "Tom"
    }, {
        name: "ASD"
    }, {
        name: "Lol"
    }];

}]);