How can I give colour to gridview's cell text according to condition. I have a below gridview and I am taking data in gridview by code behind.

 <asp:GridView ID="GridView3" runat="server" AllowPaging="true" PageSize="5"
   AutoGenerateColumns="false"  Width="100%" OnPageIndexChanging="GridView3_PageIndexChanging"
   CssClass="Grid">
                   <RowStyle CssClass="GridRow"/>
                     <Columns>
                         <asp:BoundField HeaderText="No" DataField="id" Visible="false"/>
                         <asp:BoundField HeaderText="Scenario" DataField="Scenario"/>
                         <asp:BoundField HeaderText="Type" DataField="Type"/>
                         <asp:BoundField HeaderText="Station Name" DataField="StationName"/>
                         <asp:BoundField HeaderText="Parameter" DataField="PARAM"/>
                         <asp:BoundField HeaderText="Value" DataField="Value"
                         SortExpression="Value" DataFormatString="{0:F2}"/>
                    </Columns>
                     <PagerStyle BackColor="White" Height="40px" Font-Bold="true" Font-
                      Size="Medium" ForeColor="Green" HorizontalAlign="Center"/>
                      <PagerSettings FirstPageText="First" LastPageText="Last" 
                      Mode="NumericFirstLast" PageButtonCount="3" />
                      <HeaderStyle BackColor="#ABDB78" ForeColor="Black" Height="35px" Font-
                      Size="13px" Font-Names="verdana"/>
                </asp:GridView>

I am binding data with this grid by code behind.

   protected void ReservGridBind()
    {
        string name = Request.QueryString[1].ToString();
 
        string query = "SELECT SD.id,SD.Scenario,SD.Value,PR.Type,PR.StationName,PR.PARAM 
        from sgwebdb.param_reference as PR Inner join sgwebdb.scenario_data as SD 
        ON PR.Param_Id=SD.Param_Id INNER JOIN sgwebdb.qualicision_detail as Q 
        ON SD.SCENARIO=Q.Alternative where PR.Type='Reservoirs' and Q.Alternative='" + name +"'";
 
        this.GridView1.DataSource = PSI.DataAccess.Database.DatabaseManager
                                    .GetConnection().GetData(query);
        GridView1.DataBind();

     condition :

    if  number < 0.0 then blue colour ,

     number > 0.0 && text < 4.0 then green colour,

      number > 4.0 then red colour. 

    Please help me for this gridview's cell text colour.