When I see a pink ice cube, then I see a coloured three-dimensional material object; and it seems to me that its colour is equally spatially extended. But isn't it a category mistake to speak of three-dimensional colours rather than only of three-dimensional coloured objects? Aren't all properties simple and adimensional entities? The ice cube's pinkness isn't like a gas that can fill up a volume of space, is it? Is its seeming three-dimensionality a phenomenal illusion?