Rows color on report doesn't show up on print out/preview

Question

so, we are trying to give color to rows on our report. but the color doesn't added to the print preview.

here is the report result

and this is the print out preview

and this the code

while ($bayar = mysqli_fetch_array ($querybayar)){
                        if($bayar['Status_Lunas']=="Lunas"){
                            echo "
                            <tr>
                                <td>$no</td>
                                <td>$bayar[Nama_Mahasiswa] <br>($bayar[NIM])</td>
                                <td>$bayar[Kode_Kelas_Mhs] / $bayar[Semester_Lunas]</td>
                                <td>$bayar[Angsuran1]</td>
                                <td>$bayar[Tanggal_Angsuran]</td>
                                <td>$bayar[Angsuran2]</td>
                                <td>$bayar[Tanggal_Lunas]</td>
                                <td>$bayar[Total]</td>
                                <td>$bayar[Status_Lunas]</td>
                            </tr>";
                            $no++;
                        } else {
                            echo "
                            <tr style='background-color: orange;'>
                                <td>$no</td>
                                <td>$bayar[Nama_Mahasiswa] <br>($bayar[NIM])</td>
                                <td>$bayar[Kode_Kelas_Mhs] / $bayar[Semester_Lunas]</td>
                                <td>$bayar[Angsuran1]</td>
                                <td>$bayar[Tanggal_Angsuran]</td>
                                <td>$bayar[Angsuran2]</td>
                                <td>$bayar[Tanggal_Lunas]</td>
                                <td>$bayar[Total]</td>
                                <td>$bayar[Status_Lunas]</td>
                            </tr></p>";
                            $no++;

any kind of help is much appreciated, Thank you

the problem is solved here Background color not showing in print preview

thank you