Series and Axis Styles

var score_chart = new Y.Chart({
    dataProvider: scoreDataValues,
    type: "bar",
    render: "#chart",
    seriesCollection: [
        {   
            type: "bar",
            keys: ["value"],
            styles: {
                fill: {
                    color: ["#E57627", "#77BB22", "#426AB3"]
                }
            }
        }
    ],
    axes: {
        values: {
            styles: {
                majorUnit: {
                    count: 4
                }
            }
        }
    }
});