giving a color to the particular row of the gridview.

Protected void _GridView_RowBound(Object sender, GridViewCommandEventArgs e)
{
    GridViewRow gdvrow = e.Row;
    
    if (your condition)
    {
       gdvrow.BackColor = Drawing.Color.LightGreen;
    }
    else
    {
        gdvrow.BackColor = Drawing.Color.Pink;
    }
}

e.Row.BackColor = Drawing.Color.Yellow

protected void gvDetail_RowDataBound(object sender, GridViewRowEventArgs e)
   {
       if (e.Row.RowType == DataControlRowType.Header)
       {
           e.Row.BackColor = System.Drawing.Color.BurlyWood;
       }

       if ((e.Row.RowType == DataControlRowType.DataRow))
       {

           if (e.Row.RowState == (DataControlRowState.Alternate))
           {
               e.Row.BackColor = System.Drawing.Color.LightBlue;
           }
           if (e.Row.RowState == (DataControlRowState.Edit))
           {
               e.Row.BackColor = System.Drawing.Color.Red;
           }
           if (e.Row.RowState == (DataControlRowState.Selected))
           {
               e.Row.BackColor = System.Drawing.Color.Blue;
           }
           if (e.Row.RowState == (DataControlRowState.Normal))
           {
               e.Row.BackColor = System.Drawing.Color.Coral;
           }
       }
   }