How to apply red color font to specific column for dynamic d

Question

I work on angular 7 app I need to apply red color font to specific column

but i dont know how to do that ?

I show data dynamically meaning no fixed column or data and code below working without any issue

my main thing i need is if columnname='onlineurl' make font color to red

my code as below datasource on ts as below :

this._displayreport.GetReportDetailsPaging(this.searchData).subscribe((data: any[]) => {

this.reportdetailslist = data;

this.headerCols = Object.keys(data[0]);

data.forEach((item) =>{
let values = Object.keys(item).map((key)=> item[key]).filter(item =>item != data[0].totalCount)

this.contentBody.push(values);


});


});

to get header without data i do as below :

<thead style="width: max-content">
<tr>
<th *ngFor="let coln of headerCols">
<ng-container *ngIf="coln != 'totalCount'">

{{coln}}
</ng-container>
</th>
</tr>


</tr>
</thead>

to get content data without header i do

<tr *ngFor="let rep of contentBody">

<td *ngFor="let r1 of rep"><span>{{r1}}</span></td>

<td
</tr>