If I correctly understand your requirements you want to change background of something that we call axis bands.
It is possible to provide background in code by setting appropriate brush style for each axis:
xAxis.AxisBandsStyle = new SolidBrushStyle(Color.Red); yAxis.AxisBandsStyle = new SolidBrushStyle(Color.Blue);
or by creating custom theme and applying it to the chart. If you need more information about how to do this then I would suggest to take a look on this example which uses built-in themes and custom BerryBlue theme which is defined in styles:
<!-- Axis defaults --> <item name="tickTextColor">#FF6495ED</item> <item name="majorGridLinesColor">#102A47</item> <item name="minorGridLinesColor">#0D223D</item> <item name="axisBandsColor">#0E233A</item>
Hope this will help you!
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