foo { content: (red: "literal", transparent: "literal"); content: ("red": "quoted", transparent: "quoted"); content: (red: "interpolated", transparent: "quoted"); }

bar { content: (red: "literal", transparent: "quoted", "red": "quoted"); content: (red: "literal", transparent: "literal", red: "interpolated", transparent: "quoted"); content: ("red": "interpolated", transparent: "quoted", transparent: "quoted"); }