Automation

hi, we are trying to color the text ( "ALERT") with the color red.
But we can not find a solution.

Do you know which property to use to color the text?
In the post there is also the result that produces this script .. as you can see from the image I would color the text of the last column.
Thanks so much

$start=get-date
$Pools=get-pool|select Pool_ID,Enabled,RefreshPolicy,Minimumcount,MaximumCount,VMcreated,Perc,Nota
$a=0
$soglia=90
foreach ($Pool in $Pools) 
{
 $Pools[$a].VMcreated=(Get-DesktopVM -pool_id $Pools[$a].pool_id).Count
 $Pools[$a].Perc=[int]($Pools[$a].VMcreated*100/$Pools[$a].maximumcount)
 #$allerta=$Pools[$a].MaximumCount-$soglia
 if ($Pools[$a].perc -ge $soglia)
    {
     $Pools[$a].Nota=("ALERT")
    }
$a=$a+1
}
$end=get-date
$Style = "
<style>
    BODY{background-color:white;}
    TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;}
    TH{border-width: 1px;padding: 3px;border-style: solid;border-color: black;background-color:#778899}
    TD{border-width: 1px;padding: 3px;border-style: solid;border-color: black;}
    tr:nth-child(odd) { background-color:#d3d3d3;} 
    tr:nth-child(even) { background-color:white;}    
</style>
"
$EmailFrom = "Report Pools <no-replay@xxxxxx.xx>"
# $EmailTo = 
$EmailSubject = "Testo"    
$SMTPServer = "smtp"
$emailBody1=$Pools|ConvertTo-HTML -Head $style|out-string
function send_email {
$mailmessage = New-Object system.net.mail.mailmessage 
$mailmessage.from = ($emailfrom) 
$mailmessage.To.add($emailto)
$mailmessage.Subject = $emailsubject
$mailmessage.Body = $emailbody
$attachment = New-Object System.Net.Mail.Attachment($emailattachment, 'text/plain')
$mailmessage.IsBodyHTML = $true
$SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer, 25)  
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential("$SMTPAuthUsername", "$SMTPAuthPassword") 
$SMTPClient.Send($mailmessage)
}
send_email

You can color the text ( "ALERT") with the color red by modifying line 31 of your script into:

$emailBody1=($Pools|ConvertTo-HTML -Head $style|out-string).Replace('<td>ALLERT</td>','<td style="color:red">ALLERT</td>')