@Override
    public boolean equals(final Object o) {
        if (!(o instanceof GeoStyle)) {
            return false;
        }
        final GeoStyle other = (GeoStyle) o;
        return
            Objects.equals(strokeColor, other.strokeColor) &&
            Objects.equals(strokeWidth, other.strokeWidth) &&
            Objects.equals(fillColor, other.fillColor);
    }
creates a style where fill color is a transparent version of stroke color
main/src/main/java/cgeo/geocaching/models/geoitem/GeoStyle.java