public String getMostFrequentColor() {

        HashMap<String, Integer> mfc = countColors();
        String mfcStr;
        int mfcInt = 0;
        for (Map.Entry<String, Integer> e: mfc.entrySet()){
            if(e.getValue() > mfcInt){
                mfcStr = e.getKey();
                mfcInt = e.getValue();
            }
        }
        return mfcStr;
    }