I've been working on the following code, but get an error on the
designated line - can someone help?

Dim rCell As Range
Sheets("Form").Select
Range("B2:C450").Select
For Each rCell In Selection.Cells
If rCell.Interior.ColorIndex = 35 And rCell.Value = "" Then <---
ERROR OCCURS
rCell.Borders.Color = 3
End If
Next rCell