JavaScript color Array

I watched a codecademy video and have been unable to randomize my color array. The colors are not random. I am not sure what I am doing wrong.

    function getRandomColor() {
    var color;
    var colorArray = [
        "#FF6633",
        "#FFB399",
        "#FF33FF",
        "#FFFF99",
        "#00B3E6",
        "#E6B333",
        "#3366E6",
        "#999966",
        "#809980",
        "#E6FF80",
        "#1AFF33",
        "#999933",
        "#FF3380",
        "#CCCC00",
        "#66E64D",
        "#4D80CC",
        "#FF4D4D",
        "#99E6E6",
        "#6666FF"
    ];
    for (var i = 0; i < colorArray; i++) {
        color = colorArray[Math.floor(Math.random() * colorArray.length)];
    }
    return color;
}