# Positive and Negative Colors in a Chart

Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Positive and Negative Colors in a Chart.

Merril asked if there was a way to create a line chart so that when a line represented a negative value, the color of the line would change at the point when it went negative. For instance, in a particular data series, as long as the line represented positive values, it would be blue, but when the line represented negative values, it would change to red.

Unfortunately there is no way to easily do this in Excel. There are, however, a couple of workarounds you can try. The first is to use a macro to change the line colors of chart lines that represent negative values. The following macro is an example of such an approach:

```Sub PosNegLine()
Dim chtSeries As Series
Dim SeriesNum As Integer
Dim SeriesColor As Integer
Dim MyChart As Chart
Dim R As Range
Dim i As Integer
Dim LineColor As Integer
Dim PosColor As Integer
Dim NegColor As Integer
Dim LastPtColor As Integer
Dim CurrPtColor As Integer

PosColor = 4 'Green
NegColor = 3 'red
SeriesNum = 1

Set MyChart = ActiveSheet.ChartObjects(1).Chart
Set chtSeries = MyChart.SeriesCollection(SeriesNum)
Set R = GetChartRange(MyChart, 1, "Values")

For i = 2 To R.Cells.Count
LastPtColor = IIf(R.Cells(i - 1).Value < 0, NegColor, PosColor)
CurrPtColor = IIf(R.Cells(i).Value < 0, NegColor, PosColor)

If LastPtColor = CurrPtColor Then
LineColor = LastPtColor
Else
If Abs(R.Cells(i - 1).Value) > Abs(R.Cells(i).Value) Then
LineColor = LastPtColor
Else
LineColor = CurrPtColor
End If
End If
chtSeries.Points(i).Border.ColorIndex = LineColor
Next i
End Sub
```
```Function GetChartRange(Ch As Chart, Ser As Integer, _
ValXorY As String) As Range
Dim SeriesFormula As String
Dim ListSep As String * 1
Dim Pos As Integer
Dim LSeps() As Integer
Dim Txt As String
Dim i As Integer

Set GetChartRange = Nothing

On Error Resume Next
SeriesFormula = Ch.SeriesCollection(Ser).Formula
ListSep = ","
For i = 1 To Len(SeriesFormula)
If Mid\$(SeriesFormula, i, 1) = ListSep Then
Pos = Pos + 1
ReDim Preserve LSeps(Pos)
LSeps(Pos) = i
End If
Next i

If UCase(ValXorY) = "XVALUES" Then
Txt = Mid\$(SeriesFormula, LSeps(1) + 1, LSeps(2) - LSeps(1) - 1)

Set GetChartRange = Range(Txt)
End If

If UCase(ValXorY) = "VALUES" Then
Txt = Mid\$(SeriesFormula, LSeps(2) + 1, LSeps(3) - LSeps(2) - 1)

Set GetChartRange = Range(Txt)
End If
End Function
```

When you select a chart and then run the PosNegLine macro, it looks through the chart and, for line segments between negative data point values, changes the line color to red. For line segments connecting positive data points, the line color is set to green.

The problem with this solution is that it provides only an approximation; it only works with lines connecting two data points, and it can either change the entire line segment or not. If the beginning data point is positive and the ending data point is negative, it cannot change the color of a line right as it passes into negative values.

Another approach is to format data points as different colors or shapes, based on whether they are positive or negative. A way to accomplish this is detailed at Jon Peltier's Web site, located here:

```http://www.peltiertech.com/Excel/Charts/ConditionalChart1.html
```

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (1999) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Positive and Negative Colors in a Chart.

Related Tips:

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Joe DiSabato    12 Oct 2012, 14:41
Hi, Had the same issue with an income vs expense chart when I wanted to show the "cash flow", that is income minus expenses for each month. I have a line chart by month showing the income and expense lines.

My solution was to add 2 vertical bar charts, a green for positive cash flow numbers(or blank) and red for negative cash flow. These 2 bar series overlap but do not interfer with each other. Very neat graphical illustration. Wish I could include a picture of the chart here.

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