<theme>
	<element name="TestButton" description="Test buttons">
		<property name="color" description="Text color for custom buttons" />
		<property name="background-color" description="Background color for custom buttons" />
		<state name="hover" description="Applies while the user hovers over a button." />
	</element>
</theme>

TestButton {
	background-color: green;
}

TestButton:hover {
	background-color: gray;
}

Button {
	background-color: red;
}

Button:hover {
	background-color: yellow;
}

Label {
	background-color: green;
}

Label:hover {
	background-color: gray;
}