source: josm/trunk/test/data/renderer/area-fill-color/style.mapcss

canvas {
    default-points: false;
    default-lines: false;
}

area[test=A] {
        fill-color: green;
        fill-opacity: 1;
}

area[test=B] {
        fill-color: rgba(0.5, 0, 1.0, 0.5);
        fill-opacity: 1;
}

area[test=C] {
        fill-color: red;
        fill-opacity: .5;
}

area[test=D] {
        fill-color: rgba(0.5, 0, 1.0, 0.5);
        fill-opacity: .5;
}

area[test=E] {
        fill-color: blue;
        fill-opacity: 1;
}

area[test=F] {
        fill-color: red;
        fill-opacity: 1;
}