public static GeoStyle applyAsDefault(final GeoStyle style, final GeoStyle defaultStyle) {
        if (Objects.equals(style, defaultStyle)) {
            return style;
        }
        return builder()
                .setStrokeColor(getStrokeColor(style, defaultStyle.strokeColor))
                .setStrokeWidth(getStrokeWidth(style, defaultStyle.strokeWidth))
                .setFillColor(getFillColor(style, defaultStyle.fillColor))
                .build();
    }
Fill color as Android Color int (which includes rgb as well as alpha value)
main/src/main/java/cgeo/geocaching/models/geoitem/GeoStyle.java