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                    <div ng-app="colorsApp" ng-controller="colorsController">
        <header>
          <h2>Choose one palette
           <small>
              <a href='https://afranceschetti.github.io/color-world/' target='_blank' class='color-world'>Palette taken from color-world</a>
              <a href='https://twitter.com/home?status=The%20world%20is%20even%20better%20with%20the%20nuances%20of%20%23colors!%20On%20my%20%23codepen%20http%3A%2F%2Fcodepen.io%2Fafranceschetti%2Fpen%2FzNWeVg%20%40alessandro_f%20%40GioCreations%20%20%40codepen%20' target='_blank' class='tweet-link'>
                <i class="fa fa-twitter"></i>
              </a>
            </small>
          </h2>
          <div>
            <a href ng-click="choosePalette($index)" ng-repeat="pal in palettes track by $index" class='palette-menu-item'>{{pal.name}} </a>
            <a href ng-click="showCustomForm=true" class='palette-menu-item-custom'>Your Custom</a>
            <label for='numOfShades'> Number of shades</label>
            <input type='number' placeholder="10" ng-model='numOfShades' id='numOfShades' class='num-of-shades-input' ng-change="changeNumOfShades()"></input>
          </div>
          <div class='custom-palette-form' ng-show='showCustomForm'>
            <label for='customPalette'>Your palette</label>
            <input type='text' placeholder="#aabbcc,#112233, ..." ng-model='customPalette' id='customPalette'></input>
            <a href ng-click="useCustomPalette()" class='btn'>Let's go</a>
            <a href ng-click="showCustomForm=false" class='btn-close'>&times; Close</a>
          </div>
        </header>
        <div class='main'>
          <div>
            <div class='palette-main-item' ng-repeat="col in selectedPalette track by $index" style='background-color: {{col}}; color: {{col|guessForegroundColor}}'>{{col}}</div>
          </div>
          <div>
            <div class='palette-shades-row' ng-repeat="shaderow in shades track by $index">
              <div class='palette-shade' ng-repeat="shade in shaderow track by $index"
                  style='background-color: {{shade}}; color: {{shade|guessForegroundColor}}'>
                {{shade}}
              </div>
            </div>
          </div>
        </div>
      </div>
            
          
!
            
              body{background-color: #000; color:#fff; font-family: 'Montserrat', sans-serif;}
h2 {clear: both; overflow: hidden;}
a{color: #9eabb0; text-decoration: none;}
h2 small{ margin-right: 2em; float: right;}
.color-world{color:#2e363e;}
.color-world:hover{color:#9eabb0; text-shadow: #647687 0 0 5;}
.tweet-link{color:#55aced; margin-left: 1em; font-size: 2em;}
.tweet-link:hover{color:#92caf3; text-shadow: #cbdfee 0 0 0;}

.palette-menu-item{display: inline-block; margin: .5em .5em .5em 0; padding: .5em .5em .5em 0; border-right: solid 1px #9eabb0;}
.palette-menu-item:hover{color:#c1c9cc; text-shadow: #e4e8e9 0 0 5px;}
.palette-menu-item-custom, .btn{background-color: #647687; color: #e4e8e9 ; border-radius: 2px; margin: .5em 4em .5em 1em; padding: .5em;display: inline-block;}
.palette-menu-item-custom:hover, .btn:hover{background-color:#9ca7b2; box-shadow: #e4e8e9 0 0 5px;}
.btn-close{border:solid 0  #647687; color: #9ca7b2 ; border-radius: 2px; margin: .5em 4em .5em 1em; padding: .5em;display: inline-block;}
.btn-close:hover{color: #c1c9cc; text-shadow: #e4e8e9 0 0 5px;}

input{padding: .5em; border-radius: 2px; border: solid 1px #ddd;margin: 0 1em;}
.num-of-shades-input{width: 3em; text-align: center;}
.custom-palette-form{margin: 2em 0;}

.main{display: flex;  flex-direction: row; padding: 12px; font-family: 'Source Code Pro';}
.palette-main-item{display: block; border-radius: 4px; margin: 22px;padding: .7em;}
.palette-shades-row{display: block;margin: 22px; }
.palette-shade{display: inline-block;  padding: .7em;}
.palette-shade:last-of-type{border-top-right-radius: 4px;border-bottom-right-radius: 4px;}
.palette-shade:first-of-type{border-top-left-radius: 4px;border-bottom-left-radius: 4px;}
            
          
!
            
              angular.module('colorsApp', []).controller('colorsController', function($scope){
  $scope.palettes = [ {name:"Windows Phones", colors: ['#a4c400','#60a917','#008a00','#00aba9','#1ba1e2','#0050ef','#6a00ff','#aa00ff','#f472d0','#d80073','#a20025','#e51400','#fa6800','#f0a30a','#d8c100','#825a2c','#6d8764','#7a3b3f','#647687','#76608a']},
                      {name:"Tango Desktop Project", colors: ['#fce94f','#edd400','#c4a000','#fcaf3e','#f57900','#ce5c00','#e9b96e','#c17d11','#8f5902','#8ae234','#73d216','#4e9a06','#729fcf','#3465a4','#204a87','#ad7fa8','#75507b','#5c3566','#ef2929','#cc0000','#a40000','#eeeeec','#d3d7cf','#babdb6','#888a85','#555753','#2e3436']},
                      {name:"Fedora", colors: ['#19aeff','#0047c8','#005c94','#ccff42','#9ade00','#009100','#ffff3e','#ff9900','#ff6600','#eccd84','#d49725','#804d00','#ff4141','#dc0000','#b50000','#f1caff','#d76cff','#ba00ff','#bdcdd4','#9eabb0','#364e59','#0e232e','#cccccc','#999999','#666666','#2d2d2d']},
                      {name:"Open suse", colors: ['#fcb11c','#e35302','#ffff66','#b2b247','#91d007','#217808','#d4c4ff','#4d4466','#5080ff','#000074','#babdb6','#2e3436','#ff4d4d','#8c0000']},
                      {name:"Jack Production", colors: ['#8fca40','#fff43b','#f29524','#f04090','#916ab1','#55b9fc' ]},
                      {name:"iOs 7 Palette", colors: ['#8e8e93','#ff2252','#ff342f','#ff9422','#ffcc34','#2ada70','#48c9f8','#10abda','#007afa','#5855d1']},
                      //{name:"Nimber Palette", colors: ['#c83321','#ffffff','#363C43','#808A9d','#b8c0ce','#a41807','#f2f2f2','#21262d','#6d788c','#95a0b4','#fec411','#ffb900','#72c700','#f4511e','#46a6eb','#e5a904','#e5a904','#5a9d00','#c73608','#1979be']},
                      {name:"Pantone Spring 2016", colors: ['#f7cac9','#f7786b','#91a8d0','#034f84','#fae03c','#98ddde','#9896a4','#dd4132','#b18f6a','#79c753']},
                    ];

  $scope.numOfShades = 10;
  $scope.shades = [];
  $scope.useCustomPalette = function(){
    $scope.selectedPalette = $scope.customPalette.split(",");
    for(var i = 0; i<$scope.selectedPalette.length; i++){
      if(!$scope.selectedPalette[i].startsWith("#"))
        $scope.selectedPalette[i] = "#" + $scope.selectedPalette[i];
    }

    changePalette();
  };

  $scope.choosePalette = function(paletteIndex){
    $scope.selectedPalette = $scope.palettes[paletteIndex].colors;
    changePalette();
  };

  $scope.changeNumOfShades = function(){
    changePalette();
  };

  var changePalette = function(){
      $scope.shades = [];
      for(var colorIndex=0; colorIndex<$scope.selectedPalette.length; colorIndex++){
        var shades = [];
        var delta = 1.8/$scope.numOfShades;
        var lum = -0.9;
        for(var i=0; i<$scope.numOfShades; i++){
          if(lum<0.1)
            shades.push(increase_darkness($scope.selectedPalette[colorIndex],lum));
          else
            shades.push(increase_brightness($scope.selectedPalette[colorIndex],lum));
          lum += delta;
        }
        $scope.shades.push(shades);
      }
  };
  $scope.selectedPalette = $scope.palettes[0].colors;
  changePalette();
  
}).filter('guessForegroundColor', function() {
	return function(bgHex) {
      bgHex = String(bgHex).replace(/[^0-9a-f]/gi, '');
      if (bgHex.length < 6) {
        bgHex = bgHex[0] + bgHex[0] + bgHex[1] + bgHex[1] + bgHex[2] + bgHex[2];
      }
      var rgb = parseInt(bgHex, 16);   // convert rrggbb to decimal
    	var r = (rgb >> 16) & 0xff;  // extract red
    	var g = (rgb >>  8) & 0xff;  // extract green
    	var b = (rgb >>  0) & 0xff;  // extract blue

    	var luma = 0.2126 * r + 0.7152 * g + 0.0722 * b; // per ITU-R BT.709

    	return luma > 164?"#000":"#fff";
	};
});


var increase_darkness = function(hex, lum) {
				// validate hex string
				hex = String(hex).replace(/[^0-9a-f]/gi, '');
				if (hex.length < 6) {
					hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
				}
				lum = lum || 0;

				// convert to decimal and change luminosity
				var rgb = "#", c, i;
				for (i = 0; i < 3; i++) {
					c = parseInt(hex.substr(i * 2, 2), 16);
					c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
					rgb += ("00" + c).substr(c.length);
				}
				return rgb;
			};

var increase_brightness = function(hex, lum){
    // strip the leading # if it's there
    hex = hex.replace(/^\s*#|\s*$/g, '');

    // convert 3 char codes --> 6, e.g. `E0F` --> `EE00FF`
    if(hex.length == 3){
        hex = hex.replace(/(.)/g, '$1$1');
    }

    var r = parseInt(hex.substr(0, 2), 16),
        g = parseInt(hex.substr(2, 2), 16),
        b = parseInt(hex.substr(4, 2), 16);
    return '#' +
       pad(((0|(1<<8) + r + (256 - r) * lum).toString(16)).substr(1)) +
       pad(((0|(1<<8) + g + (256 - g) * lum).toString(16)).substr(1)) +
       pad(((0|(1<<8) + b + (256 - b) * lum).toString(16)).substr(1));
};

var pad = function(n) {
    return (n <10) ? ("0" + n) : n;
};

            
          
!
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