greysColors

public class Main {
    public static void main(String[] args) {
//        ExtractCOL extructCOL = new ExtractCOL(1666);
//        int[] grey = grey();
//        System.out.println(grey[0]);
//        delta(2035471,986895);
    }
    public static int[] grey(){
        int[] greys = new int[16];
        for(int i=0;i<16;i++){
            greys[i]=0xFF*(i+1)/17*0x10101;
        }
        return greys;
    }
    public static float delta(int col1, int col2){ // Firts color = entered; Second color - from pallete;
        ExtractCOL extcol1 = new ExtractCOL(col1);
        ExtractCOL extcol2 = new ExtractCOL(col2);
        int dr = extcol1.r-extcol2.r;
        int dg = extcol1.g-extcol2.g;
        int db = extcol1.b-extcol2.b;
        float delt = (float) (0.2126 * Math.pow(dr,2) + 0.7152 * Math.pow(dg,2) + 0.0722 * Math.pow(db,2));
//        System.out.println(delt);
        return delt;
    }
    public static float[] deltsArray(int col){
        float[] delts = new float[16];
        int[] grey = grey();
        for(int i=0;i<delts.length;i++){
            delts[i]=delta(grey[i],col);
        }
        return delts;
    }
    public static int findNearColor(int col){
        float[] delts = deltsArray(col);


        return nearColor;
    }
}

public class ExtractCOL {
    public int r,g,b;
    public ExtractCOL(int value){
         r = (value >> 16) & 0xff;
         g = (value >>  8) & 0xff;
         b = (value ) & 0xff;
    }
}