Match Column And Colour Based On Condition

i am trying to do is match 2 columns data based on a condition ie i have data in column "b" of sheet called "balance" data is variable this column has unique indentifiers i want to look at another column and match the uniques identifiers in another sheet if the cell value in column "D" = "please investigate" otherwise do nothing, the (column f) it will be looking up too is in sheet called "hi- port" so if cell value in column "d" of sheet"balace"= "please investigate" match values that are same from colum "b" of sheet "balance" to that of column (f) sheet called "hi-port"

i would like to colour only entire row of sheet called "hi-port" when the data matches to other sheet ie from columns "f " too " b". colour can be any colour
igonre my ranges they are wrong just used as example

Sub start()
Dim oWs As Worksheet
Dim oRngCheck As Range
Dim oCl As Range
Dim cCola As Range
Dim cColb As Range
Dim rngIRd As Range
Dim rngACs As Range
Dim Match As Boolean
Set rngIRd = Range("a1", Range("a65536").End(xlUp)) 'define the rang
Set rngACs = Range("b1", Range("a65536").End(xlUp)) 'define the rang
Set oWs = Worksheets("balance") 'change to suit
'starts at b2 to llow for header row.......................