vb.net How to read cell color in HTML table

I need to export an HTML table from a webbrowser to an Excel file.

    Dim htmlDoc As HtmlDocument = WebBrowser1.Document
    Dim table As HtmlElement = htmlDoc.GetElementById("Table1")
    Dim rows As HtmlElementCollection = table.GetElementsByTagName("tr")
    Dim excelApp As Excel.Application = New Excel.Application
    Dim workbook As Excel.Workbook = excelApp.Workbooks.Add()
    Dim worksheet As Excel.Worksheet = workbook.Worksheets(1)

    
    For i As Integer = 0 To rows.Count - 1
        Dim cols As HtmlElementCollection = rows(i).GetElementsByTagName("td")
        For j As Integer = 0 To cols.Count - 1
            worksheet.Cells(i + 1, j + 1) = cols(j).InnerText
        Next
    Next

The code above works fine.

I'd like now to copy the cells color so I have tried this code :

Dim color As String = cols(j).Style(backcolor)
Dim cell As Excel.Range = worksheet.Cells(i + 1, j + 1)
cell.Interior.Color = ColorTranslator.FromHtml(color)

And unfortunately it does not work.
The line cols(j).Style(backcolor) returns an exception error : cannot convert color value to integer value

Any idea ?

you can only get full style string from htmlElement with htmlElement.style function. result looks like

BORDER-TOP: #aaaaaa 1px solid; BORDER-RIGHT: #aaaaaa 1px solid; BORDER-BOTTOM: #aaaaaa 1px solid; BORDER-LEFT: #aaaaaa 1px solid; BACKGROUND-COLOR: #b0c4de

so you must extract style element from it by your own.
Example with split function as elements are separated by ';':

Dim StrStyle As String = cols(1).Style
            Dim color As String
            For Each param As String In StrStyle.Split(";")
                If param.Contains("BACKGROUND-COLOR") Then
                    color = param.Split(":")(1)
                    Dim c As Color = ColorTranslator.FromHtml(color)
                End If
            Next