How-To Change the Background Color(s) of a Chart:

1. With the chart selected, position the cursor over the chart and then click the right mouse button once to open the chart's contextual menu
2. Choose "Chart Properties..."
3. Locate the Appearance tab of the Chart Properties window

You have 2 options:
a) Chart Background Color - this defines the main color of the chart
b) High/Low Zone Background Color - this defines to color of the high/low zone if shown in the chart

4. Once you have modified the colors, Click "OK". The Chart Properties window will be closed and your changes applied to the chart.