How change cell table color in php based on cell value?

I just started programming in php.

I made a table that returns values ​​from the database. I'm trying to do the following: Change the color of the third column by the value it has.

I was thinking this way, but the values ​​are repeated and the color is not the right way.

Can anyone help me please?

Did you understand my question?

Thank you all. I apologize for the inconvenience.

Code:

<table style="width:324px;" border="3" cellspacing="1" cellpadding="1">
    <tr>
        <td style="background-color:#A4A4A4;">
            <b><font face="Arial, Helvetica, sans-serif">Task</font></b>
        </td>
        <td style="background-color:#A4A4A4;">
            <b><font face="Arial, Helvetica, sans-serif">deadline</font></b>
        </td>
        <td style="background-color:#A4A4A4;">
            <b><font face="Arial, Helvetica, sans-serif">Status</font></b>
        </td>
    </tr>
<?php
$i=0;
while ($i < $num)
{
    $f1=mysql_result($result,$i,"Task");
    $f2=mysql_result($result,$i,"deadline");
    $f3=mysql_result($result,$i,"status");

    ?>
    <tr style="background-color:#A4A4A4;">
        <td><font face="Arial, Helvetica, sans-serif"><?php echo $f1; ?></font></td>
        <td><font face="Arial, Helvetica, sans-serif"><?php echo $f2; ?></font></td>
        <td><font face="Arial, Helvetica, sans-serif"><?php echo $f3; ?></font></td>
        <? 
        if($f3==2)
        { 
            // Display RED 
            ?> 
            <td style="background-color:#FF0;"><font face="Arial, Helvetica, sans-serif"><?php echo $f3; ?></font></td> 
            <? 
        }
        elseif($f3==1)
        { 
            // Display YELLOW 
            ?> 
            <td style="background-color:#0F0;"><font face="Arial, Helvetica, sans-serif"><?php echo $f3; ?></font></td> 
            <?     
        }
        else
        { 
            ?> 
            <td  style="background-color:#F00;"><font face="Arial, Helvetica, sans-serif"><?php echo $f3; ?></font></td> 
            <? 
        } 
        ?> 
    </tr> 
    <?php
    $i++;
}
?>
</table>

Result from code:

SOLVED

Thanks everyone for your help. Status is a predefined value recorded in the database. Only ranges between 1 and 4 so that the resolution has served @Daniel Andre correctly. All responses were valid for me to try to understand a little more php, but it was so simple. Again thank you all for your time and for your help.

The final result was:

<table style="width:324px;" border="3" cellspacing="1" cellpadding="1">
<tr>

<td style="background-color:#A4A4A4;">
<b><font face="Arial, Helvetica, sans-serif">Tarefa</font></b>
</td>
<td style="background-color:#A4A4A4;">
<b><font face="Arial, Helvetica, sans-serif">Prazo</font></b>
</td>
<td style="background-color:#A4A4A4;">
<b><font face="Arial, Helvetica, sans-serif">Status</font></b>
</td>
</tr>

<?php
$i=0;while ($i < $num) {
$f1=mysql_result($result,$i,"idTarefa");
$f2=mysql_result($result,$i,"PrazoExecucao");
$f3=mysql_result($result,$i,"status");

?>
<tr style="background-color:#A4A4A4;">
<td><font face="Arial, Helvetica, sans-serif"><?php echo $f1; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><?php echo $f2; ?></font></td>
<!--<td><font face="Arial, Helvetica, sans-serif"><?php echo $f3; ?></font></td>-->

<?php
  $status_colors = array(1 => '#0000FF', 2 => '#00FF00', 3 => '#FFFF00', 4 => '#FF0000');
?>
<td style="background-color: <?php echo $status_colors[$f3]; ?>;">
</tr> 


<?php
$i++;
}
?>
</table>