How to sort Integer representation of colors in Android as the rainbow

ColorSortActivity

package com.color.activities;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;

import java.util.Comparator;
import java.util.Map;
import java.util.TreeMap;

import com.color.R;

public class AssetsActivity extends ActionBarActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.assets_activity);


        Map<Integer, String> colors = new TreeMap<>(new Comparator<Integer>() {
            @Override
            public int compare(Integer lhs, Integer rhs) {

                float[] lhsv = new float[3];
                float[] rhsv = new float[3];

                Color.colorToHSV(lhs, lhsv);
                Color.colorToHSV(rhs, rhsv);

                for (int i = 0; i < 3; i++) {
                    if (lhsv[i] != rhsv[i]) {
                        return (lhsv[i] < rhsv[i]) ? -1 : 1;
                    }
                }
                return 0;
            }
        });

        colors.put(-16095289, "0A67C7");
        colors.put(-15298149, "16919B");
        colors.put(-12605458, "3FA7EE");
        colors.put(-16167274, "094E96");

        for (Map.Entry<Integer, String> color : colors.entrySet()) {
            Log.e("Color", color.getKey() + " - " + color.getValue());
        }
        // Gives:
        //    Color﹕ -15298149 - 16919B
        //    Color﹕ -12605458 - 3FA7EE
        //    Color﹕ -16095289 - 0A67C7
        //    Color﹕ -16167274 - 094E96
        
    }
}