how to change gridview cell color

Here is the code for that 

       

  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

        DataKeyNames="ID" DataSourceID="AccessDataSource1"

        ondatabound="GridView1_DataBound" onrowdatabound="GridView1_RowDataBound">

        <Columns>

            <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False"

                ReadOnly="True" SortExpression="ID" />

            <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />

            <asp:BoundField DataField="Location" HeaderText="Location"

                SortExpression="Location" />

            <asp:BoundField DataField="ParentID" HeaderText="ParentID"

                SortExpression="ParentID" />

            <asp:BoundField DataField="Content" HeaderText="Content"

                SortExpression="Content" />

            <asp:BoundField DataField="ShortContent" HeaderText="ShortContent"

                SortExpression="ShortContent" />

            <asp:TemplateField HeaderText="Status" ControlStyle-Width="75px" >

                <ItemTemplate>

                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("ParentID") %>'></asp:Label>

                </ItemTemplate>

            </asp:TemplateField>

        </Columns>

    </asp:GridView>

    <asp:AccessDataSource ID="AccessDataSource1" runat="server"

        DataFile="App_Data/Database1.accdb" SelectCommand="SELECT CMSMenus.ID, CMSMenus.Title, CMSMenus.Location, CMSMenus.ParentID, CMSMenus.Content, CMSMenus.ShortContent

FROM CMSMenus;

">

    </asp:AccessDataSource>

For Code behind here is the code behind I coloured the cells depends on column ParentID value you can choose your own

  protected void GridView1_DataBound(object sender, EventArgs e)

    {

        for (int i =0 ; i <= GridView1.Rows.Count -1 ;i++)

        {

            Label lblparent = (Label)GridView1.Rows[i].FindControl("Label1");

            if (lblparent.Text == "1")

            {

                GridView1.Rows[i].Cells[6].BackColor = Color.Yellow;

                lblparent.ForeColor = Color.Black;

            }

            else

            {

                GridView1.Rows[i].Cells[6].BackColor = Color.Green;

                lblparent.ForeColor = Color.Yellow;

            }

                

        }

    }