You will have to make use of VBA to acheive this...Right click on the
sheetView and paste the below code. If you are new to macros set the
Security level to low/medium in (Tools|Macro|Security).

The color referred here is 'Bright Green'. Change the color index as needed.

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
Application.EnableEvents = False
If Range("L5").Interior.ColorIndex = 4 And _
Range("Q5").Interior.ColorIndex = 4 And _
Range("V5").Interior.ColorIndex = 4 Then
Range("AD5").Interior.ColorIndex = 4
Range("AD5") = 1
Else
Range("AD5").Interior.ColorIndex = 3
Range("AD5") = 0
End If
Application.EnableEvents = True
End Sub

If this post helps click Yes
---------------
Jacob Skaria


"Ra" wrote:

Please can you help me with the following problem:

I have three cells: L5, Q5 and V5, which when I colour green, then I would
like for cell AD5 to be automatically coloured green and a number 1 be placed
in it.

If on the other hand cells L5, Q5, V5 are any other colour, then cell AD5
should be coloured red and a zero to be placed in it.

Please can you help me to devise a method of doing this.

Many thanks for your help and support,