Highlight blank cells without using select?

With ActiveSheet
    lastrow = .Cells(.Rows.Count, "C").End(xlUp).Row
    LastCol = .Cells(5, .Columns.Count).End(xlToLeft).Column
End With

ActiveSheet.Range(Cells(5, 3), Cells(lastrow, LastCol)).Select
Selection.SpecialCells(xlCellTypeBlanks).Select
With Selection.Interior
    .Pattern = xlSolid
    .PatternColorIndex = xlAutomatic
    .ThemeColor = xlThemeColorAccent2
    .TintAndShade = 0.599993896298105
    .PatternTintAndShade = 0
End With

I'm using the above code to highlight blank cells in a dynamic range. I was only able to get this to work with the use of select which i don't like to use in the macros.

Is there any way i can refer to ActiveSheet.Range(Cells(5, 3), Cells(lastrow, LastCol)) and then select all the blank cells in it without using select?

Thank you!