Add Custom Color to pie-chart

Question

I have requirement to add specific color to each element in pie-chart.
Below is my code for pie-chart with static json.
Instead of the default colors given by the viz charts, I want to have red, green, orange and blue color in the pie-chart.
Has someone changed the colors successfully?
var oModel = new sap.ui.model.json.JSONModel({
     businessData : [
               {Country :"Canada",revenue:2410.87, color: "red"},
                {Country :"China",revenue:638.29, color: "green"},
                {Country :"France",revenue:487.66, color: "orange"},
                {Country :"Germany",revenue:170.23, color: "blue"}
var oDataset = new sap.viz.ui5.data.FlattenedDataset({
         dimensions : [ {axis : 1, name : 'Country',  value : "{Country}" } ],
         measures : [ { name : 'Revenue',  value : '{revenue}' } ],
         data : { path : "/businessData" }
var oBarChart = new sap.viz.ui5.Pie({
          width : "80%", height : "400px",
          plotArea : {
                   'colorPalette' : d3.scale.category20().range()
           title : { visible : true, text : 'Revenue By Country' },
           dataset : oDataset
oBarChart.setModel(oModel);
oBarChart.placeAt("sample1");
Thanks,
Shashi

Answer 1

After lot of permutation and combination, I figured it out how to change the color.
Changing colorPalette to 'colorPalette' : ['#00B050','#CCFF66','#FF0000','#FFC300'], it worked
var oBarChart = new sap.viz.ui5.Pie({
          width : "80%", height : "400px",
          plotArea : {
                   'colorPalette' : ['#00B050','#CCFF66','#FF0000','#FFC300']
           title : { visible : true, text : 'Revenue By Country' },
           dataset : oDataset