Changing color (ex: forecolor) of an element is actually easy. You only have to do this one line script
txtNotification.ForeColor = System.Drawing.Color.Red;
But the weakness of this way is you can’t specify your personal color. Solution to this matter is we have to define our custom color (either in css file or by code) first and then use that color.
System.Drawing.Color merah = System.Drawing.ColorTranslator.FromHtml("#C00"); txtNotification.ForeColor =merah;
// define "merah" first on your css file txtStatus.CssClass = merah;