How to change color of label on click event

Question

Hi All,

 

I have label 

 

<asp:Label ID="lbldata" runat="server" class='a result btn-primary' Text='<%# Eval("Row#") %>' onclick='<%# "fnShow(" +Eval("PropertyDetailsId") + " );" %>' />

 

This label is generates number of labels its depend on Propertydetails ID

 

Its looks like Below image

 

So my requirement is how to change color of this lable when i click particular one.