Nifty UI android wrong colors

Troubleshooting android
1

I create simple popup

new PopupBuilder("detailResultPopup") {{
    childLayoutCenter();
    panel(new PanelBuilder() {{
        width("50%");
        height("50%");
        alignCenter();
        valignCenter();
        onStartScreenEffect(new EffectBuilder("move") {
            {
                length(400);
                inherit();
                effectParameter("mode", "in");
                effectParameter("direction", "top");
            }
        });
        onEndScreenEffect(new EffectBuilder("move") {
            {
                length(400);
                inherit();
                neverStopRendering(true);
                effectParameter("mode", "out");
                effectParameter("direction", "top");
            }
        });
        onEndScreenEffect(new EffectBuilder("fadeSound") {
            {
                effectParameter("sound", "credits");
            }
        });
        onActiveEffect(new EffectBuilder("gradient") {
            {
                effectValue("offset", "0%", "color", "#00000f");
                effectValue("offset", "75%", "color", "#00213cff");
                effectValue("offset", "100%", "color", "#cccccc");
            }
        });
        onActiveEffect(new EffectBuilder("playSound") {
            {
                effectParameter("sound", "credits");
            }
        });

    }});
}}.registerPopup(nifty);

Element detailResultPopup = nifty.createPopup("detailResultPopup");
nifty.showPopup(nifty.getCurrentScreen(),detailResultPopup.getId(),null);

Popup is showed but i see gradient of green color instead of gray.
#cccccc = must be gray, but displayed green color. Why?