On Check Grid view Rows color change

On Check Grid view Rows color change
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protected void chkStatus_CheckedChanged(object sender, EventArgs e)
{
        private const string colorPresent = "#BDF8B9";

private const string colorAbsent = "#FFB5B2";


        //to enable/disable Isgranted checkbox.
        CheckBox chk = (CheckBox)sender;
        CheckBox chkGr = (CheckBox)((CheckBox)sender).Parent.Parent.FindControl("chkGranted");
        if (chk.Checked)
        {

            chkGr.Checked = false;
            chkGr.Enabled = false;
            chkGr.Text = "---";
        }
        else
        {
            chkGr.Enabled = true;

            chkGr.Text = "IsGranted";
        }

CheckBox checkBox = (CheckBox)sender;
GridViewRow parent = (GridViewRow)checkBox.Parent.Parent;
TextBox empty = (TextBox)parent.FindControl("txtRemarks");
empty.Text = string.Empty;
if (checkBox.Checked)
{
empty.Enabled = false;
parent.BackColor = ColorTranslator.FromHtml("#BDF8B9");
return;
}
empty.Enabled = true;
parent.BackColor = ColorTranslator.FromHtml("#FFB5B2");
     
}