Color test on the chart

Hi I tryed to put some 3 variables to display on the chart, one next to another 

I have make one text, but I would like to make a different color for diffrent variables: 

var text = piecConverted + pietnascieConverted + trzydziesciConverted;
            Chart.DrawStaticText("Dupa", tekst, VerticalAlignment.Top, HorizontalAlignment.Left, Color.Green);

How to do this ?

I Woul like to have for example piecConverted= green, pietnascieConverted = red and trzydziesciConverted=yellow

They doesn;t have to be in one line. They can by one under the other