Alterando as cores do título de um dbgrid em runtime

Procedure TForm1.DBGrid1TitleClick(Column: TColumn);
var
I : integer;
begin
for i:=0 to DBGrid1.Columns.count-1 do begin
DBGrid1.Columns[i].Title.Color := clBtnFace;
DBGrid1.Columns[i].Title.Font.Color := clBlack;
DBGrid1.Columns[i].Title.Font.Style := [];
end;
Column.Title.color := ClYellow;
Column.Title.Font.Style := [ fsBold, fsItalic];
Column.Title.Font.Color := clRed;
end;