Hi
you need VBA for this. Using a procedure from Bob Phillips and Harlan
Grove you may try the
following:
To get the colorindex of a specific cell use
=ColorIndex(A1)
In your case maybe the formula
=IF(ColorIndex(A1)=3,A1*5,"don't know")
for multiplying red cells with 5
Adapt this to your requirements
------
'Code to paste in one of your modules
'---------------------------------------------------------------------
Function ColorIndex(rng As Range, _
Optional text As Boolean = False) As Variant
'---------------------------------------------------------------------
' Function: Returns the colorindex of the supplied range
' Synopsis:
' Author: Bob Phillips/Harlan Grove
'
'---------------------------------------------------------------------
Dim cell As Range, row As Range
Dim i As Long, j As Long
Dim iWhite As Long, iBlack As Long
Dim aryColours As Variant
If rng.Areas.Count > 1 Then
ColorIndex = CVErr(xlErrValue)
Exit Function
End If
iWhite = WhiteColorindex(rng.Worksheet.Parent)
iBlack = BlackColorindex(rng.Worksheet.Parent)
If rng.Cells.Count = 1 Then
If text Then
aryColours = DecodeColorIndex(rng, True, iBlack)
Else
aryColours = DecodeColorIndex(rng, False, iWhite)
End If
Else
aryColours = rng.Value
i = 0
For Each row In rng.Rows
i = i + 1
j = 0
For Each cell In row.Cells
j = j + 1
If text Then
aryColours(i, j) = _
DecodeColorIndex(cell,True,iBlack)
Else
aryColours(i, j) = _
DecodeColorIndex(cell,False,iWhite)
End If
Next cell
Next row
End If
ColorIndex = aryColours
End Function
Private Function WhiteColorindex(oWB As Workbook)
Dim iPalette As Long
WhiteColorindex = 0
For iPalette = 1 To 56
If oWB.Colors(iPalette) = &HFFFFFF Then
WhiteColorindex = iPalette
Exit Function
End If
Next iPalette
End Function
Private Function BlackColorindex(oWB As Workbook)
Dim iPalette As Long
BlackColorindex = 0
For iPalette = 1 To 56
If oWB.Colors(iPalette) = &H0 Then
BlackColorindex = iPalette
Exit Function
End If
Next iPalette
End Function
Private Function DecodeColorIndex(rng As Range, text As Boolean, idx As
_
Long)
Dim iColor As Long
If text Then
iColor = rng.font.ColorIndex
Else
iColor = rng.Interior.ColorIndex
End If
If iColor < 0 Then
iColor = idx
End If
DecodeColorIndex = iColor
End Function
