Gridview Linkbutton Disable and Keep Black Forecolor?

I can disable a Linkbutton in a Gridview like so. I also need to keep its normal 'Black' forecolor. My Forecolor attempt is not working, still grayed-out. Help.                

                   LinkButton lb = (LinkButton)e.Row.FindControl("lbPartNo");

                    if (lb.Text.Trim() == "123456")
                    {
                        lb.Enabled = false;
                        lb.ForeColor = System.Drawing.Color.Black;
                    }