The problem is that the cell J7 is using conditional formatting. Ordinary formatting gets transferred, but conditional formatting does not and even with a macro there is no simple way to find what conditional format has been applied.
If you use a macro you have to create a copy of the conditional formating formulas to work out which format is being applied, and then lookup the color for that conditional format. It's quite involved.
An alternative is to create a macro which acts like a conditional format, calculates a color based on the cell value and applies it to both the cell and the chart item. The cell has no conditional formatting applied, but both the cell and the chart item will change color based on the cell value (it doesn't have to be color it could be font, number format or borders etc.)
The macro is triggered by any change in cell values on the worksheet that contains cell J7. The macro tests that the changed cell is J7, then creates one of three colors - you could expand this to multiple colors based on the cell value, (it's not limited like conditional formats in Excel 2003).
The macro goes in the worksheet's Change event:
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo ErrHnd
'test if changed cell is our chart-linked cell
If Target.Address = "$J$7" Then
Dim lngIdx As Long
'test the value in the cell
'and create a color value
Select Case Target.Value
Case Is < 10
lngIdx = RGB(250, 10, 10)
Case 10 To 19
lngIdx = RGB(40, 40, 200)
lngIdx = RGB(50, 150, 10)
'apply the color to the cell and to the chart object
Worksheets("Sheet1").ChartObjects("Chart 2").Chart. _
ChartTitle.Interior.Color = lngIdx
Target.Interior.Color = lngIdx
In this example the link is to the chart title in Chart 2. Hold down the Ctrl key and click your chart to get the name. Change the chart name and chart object as required.
Hope this is of interest.