Try setting the BackColor or ForeColor property of Label like
BackColorr='<%# Convert.ToString(Eval("Fieldname")) == "Break" ? "red" :"green" %>'
// change the fieldname ,color and also format accordingly
Or
BackColorr='<%# Convert.ToString(Eval("Fieldname")) == "Break" ? System.Drawing.ColorTranslator.FromHtml("#FDEEEE") :System.Drawing.ColorTranslator.FromHtml("#FFFFF") %>'
Or even you can use a c# method and just call it in the Markup .
Other alternative is to handle in the RowDataBound event and FindControl the Label control and set the color.