Here's some simple tests:
(1) alternating colours - odd rows are blue background, even rows have red background
<element id="Content[TrackDetail].Body.Default" bg="0,0,255" fg="255,255,255" bdr="0,0,0" />
<element id="Content[TrackDetail].ListAlternating.Default" bg="255,0,0" fg="255,255,255" bdr="0,0,0" />
(2) same colour all rows have blue background
<element id="Content[TrackDetail].Body.Default" bg="0,0,255" fg="255,255,255" bdr="0,0,0" />
<element id="Content[TrackDetail].ListAlternating.Default" bg="0,0,255" fg="255,255,255" bdr="0,0,0" />
If you don't see this it is possible that there is are <element id="Content[TrackDetail] items that will override the settings ...