I would like to highlight a line of cells when the cell is selected. I tried
the following code:

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
Dim rng As Range
Dim ycell As Range

Set ycell = ActiveCell.EntireRow.Cells(3)
Set rng = Range(ycell, ycell.Offset(0, 5))
rng.Interior.ColorIndex = 36

End Sub

but I get an error that says 'Unable to set ColorIndex property of the
interior class'.
What am I doing wrong here? or is there a better way to do this?
Thanks