// Function to color a DBGrid (declared as private) 
procedure TForm1.ColorGrid(dbgIn: TDBGrid; qryIn: TQuery; const Rect: TRect; 
  DataCol: Integer; Column: TColumn; 
  State: TGridDrawState); 
var  
  iValue: LongInt; 
begin 
  // color only the first field
  if (DataCol = 0) then 
  begin 
    //Проверяем значение поля и присваеваем цвет  
     
    iValue := qryIn.FieldByName('HINWEIS_COLOR').AsInteger; 
    case iValue of 
      1: dbgIn.Canvas.Brush.Color := clGreen; 
      2: dbgIn.Canvas.Brush.Color := clLime; 
      3: dbgIn.Canvas.Brush.Color := clYellow; 
      4: dbgIn.Canvas.Brush.Color := clRed; 
    end; 
     
    dbgIn.DefaultDrawColumnCell(Rect, DataCol, Column, State); 

  end; 
end; 

procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; 
  const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState); 
begin 
  ColorGrid(DBGrid1, Query1, Rect, DataCol, Column, State); 
end;