I found a way around this.
I ended up creating three queries one for >2750, one for
<1100, and one for <=2750 and >=1100.
Then I created three chartseries for each query and colored
them accordingly.
I have included the cfchart code below.
<cfchart style="chart.xml" chartheight="350"
chartwidth="600">
<cfchartseries
query="chartdata2750"
type="bar"
valuecolumn="drymatter"
itemcolumn="paddock"
seriescolor="red">
</cfchartseries>
<cfchartseries
query="chartdata"
type="bar"
valuecolumn="drymatter"
itemcolumn="paddock"
seriescolor="green">
</cfchartseries>
<cfchartseries
query="chartdata1100"
type="bar"
valuecolumn="drymatter"
itemcolumn="paddock"
seriescolor="yellow">
</cfchartseries>
</cfchart>