tourdeflexmodules/src/spark/css/CSSTypeClassSelectorExample.mxml

<?xml version="1.0" encoding="utf-8"?>
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<s:Module xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx">
	<fx:Style>
		@namespace "library://ns.adobe.com/flex/spark";
		
		List.blueTheme {
			selectionColor: #7FACF6;
		}
		
		List.greenTheme {
			selectionColor: #00CF3F;
		}
		
		Panel.blueTheme {
			contentBackgroundColor: #9abbdc;
			
		}
		
		.blueTheme {
			focusColor: #3D73EF;
			symbolColor: #2A3982;
			
		}
	</fx:Style>
	
	<s:Panel title="Advanced CSS: Type+Class Selector Sample" height="100%" width="100%" styleName="blueTheme">
		
		<s:layout>
			<s:HorizontalLayout paddingLeft="10" paddingRight="10" paddingTop="10" paddingBottom="10"/>
		</s:layout>
		
		<s:Label width="270" text="This Panel has a styleName, but the Lists and Panel have some different styles defined in a Type+Class selector. See the style section for the styles applied."/>
		<s:ComboBox selectedIndex="0">
			<s:ArrayCollection source="[Monday,Tuesday,Wednesday,Thursday,Friday]"/>
		</s:ComboBox>		
		<s:VGroup horizontalCenter="0" top="8">
			<s:Label text="Text:"/>
			<s:TextInput text="some text" styleName="blueTheme"/>
			<s:Label text="Units:"/>
			<s:NumericStepper styleName="blueTheme"/>
			<s:List id="carList" selectedIndex="2" styleName="blueTheme">
				<s:dataProvider>
					<mx:ArrayCollection source="[Civic, M3, Prius, Blazer, Tahoe]" />
				</s:dataProvider>
			</s:List>
		</s:VGroup>
		<s:List id="fruitList" selectedIndex="2" styleName="greenTheme">
			<s:dataProvider>
				<mx:ArrayCollection source="[Apples,Bananas,Grapes]" />
			</s:dataProvider>
		</s:List>
	</s:Panel>

</s:Module>