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HTML

              
                #color-compare-space.disabled
  #color-compare-close
  .horizontal-compare
    .color.first-color(onclick="displayCopyPaste(this)")
    .color.second-color(onclick="displayCopyPaste(this)")
    .color.third-color(onclick="displayCopyPaste(this)")
  .vertical-compare
    .color.first-color(onclick="displayCopyPaste(this)")
    .color.second-color(onclick="displayCopyPaste(this)")
    .color.third-color(onclick="displayCopyPaste(this)")

    
#nav-block
  nav#collection-space
    p Saved
    p#clear(onclick="clearColors()") clear
header
  button#nav-btn
    #nav-image
  label(for="nav-btn") SAVED
  a#logo(href="#") SUPER
    span.orange
      | RANDOM
    span.red
      | COLOR
    | GENERATOR
      
.holder()
  #save-button(onclick="saveColors()")
    | Save Colors
  .colored(onclick="generator()")
  .colored(onclick="generator()" id="first" data-first="true")
    div
      | Click here to generate color
  .colored(onclick="generator()")
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Open+Sans:400,300,600,700);
* {
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  overflow: hidden;
  font-family: 'Open Sans';
  position: relative;
  z-index: 0;
  display: block;
  transition: transform 0.35s ease-in-out;
}

body.active {
  transform: translateX(270px);
}

header {
  height: 75px;
  max-height: 75px;
  width: 100vw;
  background-color: #e9e9e9;
  display: flex;
  flex-direction: row;
  position: fixed;
  z-index: 10;
  box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.5);
}

header #logo {
  font-weight: 600;
  font-size: 30px;
  text-align: center;
  width: 100%;
  margin: 0;
  margin-top: 15px;
  color: #34495e;
  align-self: baseline;
  text-decoration: none;
}

header #logo .orange {
  color: #e67e22;
}

header #logo .red {
  color: #e74c3c;
}

.holder {
  height: 100vh;
  padding-top: 75px;
  width: 100vw;
  display: block;
  position: relative;
  overlow: hidden;
  z-index: 2;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #f39c12;
}

.holder #save-button {
  height: 40px;
  width: 200px;
  font-size: 20px;
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: absolute;
  z-index: 9;
  top: 75px;
  cursor: cell;
}

.holder .colored {
  width: 100%;
  height: 33.33%;
  color: rgba(255, 255, 255, 0.35);
  background-color: #f39c12;
  font-size: 55px;
  position: relative;
  z-index: 3;
  cursor: pointer;
  font-size: 45px;
  color: rgba(255, 255, 255, 0.3);
  font-weight: 300;
  display: flex;
  flex-direction: column;
  justify-content: center;
  -ms-align-items: center;
  align-items: center;
  box-shadow: 0px 0px 10px transparent;
  transition: color 0.25s, transform 0.25s ease-in-out, box-shadow 0.3s ease-in-out, background-color 0.5s;
}

.holder .colored::selection {
  background-color: transparent;
}

.holder .colored:hover {
  z-index: 4;
  color: white;
  transform: scale(1.1);
  transition: color 0.25s, transform 0.25s ease-in-out, box-shadow 0.3s ease-in-out;
  box-shadow: 0px 0px 25px rgba(0, 0, 0, 0.5);
}

#nav-btn {
  float: left;
  vertical-align: baseline;
}

label[for="nav-btn"] {
  float: left;
  vertical-align: baseline;
  font-size: 20px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

#nav-btn {
  height: 40px;
  width: 40px;
  border: 0;
  outline: 0;
  align-self: baseline;
  top: -8px;
  position: relative;
  z-index: 10;
  background-color: #e9e9e9;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  border-radius: 30px;
}

#nav-btn:active,
#nav-btn:focus {
  border: 0;
  ouline: 0;
}

#nav-btn #nav-image {
  height: 2px;
  width: 30px;
  background-color: #111;
  position: relative;
  display: block;
  transition: 0.2s ease-in-out;
}

#nav-btn #nav-image::after,
#nav-btn #nav-image::before {
  transition: 0.2s ease-in-out;
  position: absolute;
  content: ' ';
  background-color: #111;
  height: 2px;
  width: 30px;
  display: block;
}

#nav-btn #nav-image::after {
  top: 10px;
  left: 0;
  right: 0;
}

#nav-btn #nav-image::before {
  height: 2px;
  top: -10px;
  left: 0;
  right: 0;
}

#nav-btn.active #nav-image {
  transition: 0.2s ease-in-out;
  background-color: rgba(255, 255, 255, 0);
}

#nav-btn.active #nav-image::after {
  top: 0;
  transform: rotateZ(45deg);
  transition: 0.2s ease-in-out;
}

#nav-btn.active #nav-image::before {
  top: 0;
  transform: rotateZ(-45deg);
  transition: 0.2s ease-in-out;
}

#nav-block {
  width: 270px;
  height: 100vh;
  background-color: #e9e9e9;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  position: fixed;
  overflow-y: scroll;
  overflow-x: hidden;
  text-transform: uppercase;
  left: -270px;
  top: 0;
  z-index: 20;
  box-shadow: inset -10px 0px 15px rgba(0, 0, 0, 0.2);
}

#nav-block::-webkit-scrollbar {
  width: 5px;
  height: 5px;
  background-color: transparent;
  background-position: center right;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: 0;
  transition: 0.4s ease;
}

#nav-block::-webkit-scrollbar-track {
  background-color: transparent;
  -webkit-box-shadow: inset 0 0 6px transparent;
}

#nav-block::-webkit-scrollbar-thumb {
  background-color: #777;
  transition: opacity 0.3s ease;
  border-radius: 5px;
}

#nav-block::-webkit-scrollbar-thumb:hover {
  transition: opacity 0.3s ease;
  background-color: #ccc;
}

#nav-block nav {
  width: 100%;
  display: block;
  position: relative;
}

#nav-block nav p {
  font-size: 25px;
  text-align: center;
  font-weight: 600;
  color: #333;
}

#nav-block nav p#clear {
  color: #777;
  font-size: 20px;
  cursor: pointer;
}

#nav-block nav .collection {
  width: 100%;
  height: 55px;
  color: white;
  position: relative;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

#nav-block nav .collection .color,
#nav-block nav .collection .display-palette {
  padding: 15px;
  height: 35px;
  width: 35px;
  position: relative;
  display: block;
  float: left;
  margin: 5px;
  transition: margin 0.25s;
  cursor: pointer;
  color: transparent;
  border-radius: 25px;
}

#nav-block nav .collection .color:hover,
#nav-block nav .collection .display-palette:hover {
  margin: 0px 10px 0px 10px;
  transform: scale(1.1);
}

#nav-block nav .collection .display-palette {
  background-color: #fff;
  width: 50px;
  color: #c9c9c9;
  font-weight: 700;
  padding: 7px;
  text-align: center;
}

@media (max-width: 768px) {
  label[for="nav-btn"] {
    display: none !important;
  }
  header {
    height: 50px;
  }
  header #logo {
    font-size: 15px !important;
  }
}

#color-compare-space {
  width: 100vw;
  min-height: 100vh;
  display: block;
  position: absolute;
  z-index: 25;
  opacity: 1;
  pointer-events: auto;
  background-color: rgba(255, 255, 255, 0.75);
  transition: all 0.2s;
}

#color-compare-space.disabled {
  opacity: 0;
  pointer-events: none;
}

#color-compare-space #color-compare-close {
  position: fixed;
  width: 35px;
  height: 35px;
  top: 20px;
  left: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

#color-compare-space #color-compare-close::after,
#color-compare-space #color-compare-close::before {
  width: 35px;
  height: 2px;
  content: '';
  position: absolute;
  background-color: #222;
  display: block;
  transition: transform 0.15s;
}

#color-compare-space #color-compare-close::after {
  transform: rotateZ(45deg);
}

#color-compare-space #color-compare-close::before {
  transform: rotateZ(-45deg);
}

#color-compare-space #color-compare-close:hover::after {
  transform: rotateZ(45deg) scale(1.35);
}

#color-compare-space #color-compare-close:hover::before {
  transform: rotateZ(-45deg) scale(1.35);
}

#color-compare-space .horizontal-compare {
  width: 80vw;
  margin: 20px 10vw;
  height: 30vh;
  background-color: transparent;
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  flex-direction: row;
}

#color-compare-space .horizontal-compare .color {
  width: 33%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  color: white;
  font-size: 25px;
}

#color-compare-space .vertical-compare {
  width: 80vw;
  margin: 20px 10vw;
  height: 50vh;
  background-color: transparent;
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  flex-direction: column;
}

#color-compare-space .vertical-compare .color {
  width: 100%;
  height: 32%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#color-compare-space .color {
  margin: 0;
  padding: 0;
  color: white;
  font-size: 25px;
  transition: transform 0.35s;
  cursor: pointer;
}

#color-compare-space .color:hover {
  transform: scale(1.025);
}
              
            
!

JS

              
                function generator() {
  var colorBlocks = document.getElementsByClassName("colored"),
    superRandomCharacters = '1234567890abcdef'.split(''),
    superRandomColor = function() {
      var color = "#";
      for (var i = 0; i < 6; i++)
        color += superRandomCharacters[Math.floor(Math.random() * 16)];

      return color;
    },
    random = [superRandomColor(), superRandomColor(), superRandomColor()];
  for (var i = 0; i < colorBlocks.length; i++) {
    colorBlocks[i].style.backgroundColor = random[i];
    colorBlocks[i].innerHTML = random[i];
  }
  var firstColor = _("first");
  firstColor.dataset.first = false;
}
window.onload = function() {

  var navBtn = _("nav-btn"),
    navBlock = _("nav-block"),
    colorCompareSpace = _("color-compare-space"),
    colorCompareClose = _("color-compare-close"),
    body = document.body;

  navBtn.addEventListener("click", function() {
    toggleClass(navBtn, "active");
    toggleClass(navBlock, "active");
    toggleClass(body, "active");
  });

  colorCompareClose.addEventListener("click", function() {
    toggleClass(colorCompareSpace, "disabled");
  });
}

function displayCopyPaste(div) {
  var colorValue = div.innerHTML;
  window.prompt("Copy and press Enter", colorValue)
}

function displayPalette(div) {
  var displaySpace = _("color-compare-space");
  displaySpace.className = "";

  var navBtn = _("nav-btn"),
    navBlock = _("nav-block"),
    body = document.body;

  toggleClass(navBtn, "active");
  toggleClass(navBlock, "active");
  toggleClass(body, "active");

  var collectionArray = div.parentElement.children;

  var elColorH = collectionArray[1].innerHTML,
    elColorH2 = collectionArray[2].innerHTML,
    elColorH3 = collectionArray[3].innerHTML;

  var elColorArrayHex = [elColorH, elColorH2, elColorH3];

  var elColorR = collectionArray[1].style.backgroundColor,
    elColorR2 = collectionArray[2].style.backgroundColor,
    elColorR3 = collectionArray[3].style.backgroundColor;

  var elColorArrayRgb = [elColorR, elColorR2, elColorR3];

  var first = document.getElementsByClassName("first-color"),
    second = document.getElementsByClassName("second-color"),
    third = document.getElementsByClassName("third-color");

  for (i = 0; i < first.length; i++) {
    first[i].style.backgroundColor = elColorArrayRgb[0];
    first[i].innerHTML = elColorArrayHex[0];
  }
  for (i = 0; i < second.length; i++) {
    second[i].style.backgroundColor = elColorArrayRgb[1];
    second[i].innerHTML = elColorArrayHex[1];
  }
  for (i = 0; i < third.length; i++) {
    third[i].style.backgroundColor = elColorArrayRgb[2];
    third[i].innerHTML = elColorArrayHex[2];
  }

}

var collections = []

function saveColors() {
  var colorBlocks = document.getElementsByClassName("colored"),
    colSpace = _("collection-space"),
    firstColor = _("first");

  var color1 = colorBlocks[0].textContent,
    color2 = colorBlocks[1].textContent,
    color3 = colorBlocks[2].textContent;

  if (firstColor.dataset.first != "true") {
    collections.push({
      collection: [color1, color2, color3]
    });
    console.log(collections);

    var collectionBlock = document.createElement('div');
    collectionBlock.className = "collection";

    var color = document.createElement('div');
    color.className = "color";
    color.setAttribute("onclick", "displayCopyPaste(this)");

    var color2 = document.createElement('div');
    color2.className = "color";
    color2.setAttribute("onclick", "displayCopyPaste(this)");

    var color3 = document.createElement('div');
    color3.className = "color";
    color3.setAttribute("onclick", "displayCopyPaste(this)");

    var displayPaletteBlock = document.createElement('div');
    displayPaletteBlock.className = "display-palette";
    displayPaletteBlock.setAttribute("onclick", "displayPalette(this)");
    displayPaletteBlock.innerHTML = "all";

    for (i = 0; i < collections.length; i++) {
      colSpace.appendChild(collectionBlock);
      //cN = colorName

      for (cN = 0; cN < collections[i].collection.length; cN++) {
        color.innerHTML = collections[i].collection[0];
        color.style.backgroundColor = collections[i].collection[0];

        color2.innerHTML = collections[i].collection[1];
        color2.style.backgroundColor = collections[i].collection[1];

        color3.innerHTML = collections[i].collection[2];
        color3.style.backgroundColor = collections[i].collection[2];
      }
      collectionBlock.appendChild(displayPaletteBlock);
      collectionBlock.appendChild(color);
      collectionBlock.appendChild(color2);
      collectionBlock.appendChild(color3);
    }
  }
}

//Just a helpful function.
function _(el) {
  return document.getElementById(el);
}

//A function to clear colors off in the saves column
function clearColors() {
  var colSpace = _("collection-space");
  colSpace.innerHTML = "<p>Saved</p><p id='clear' onclick='clearColors()'>clear</p>";
  collections = []
}

function toggleClass(el, _class) {
  if (el && el.className && el.className.indexOf(_class) >= 0) {
    var pattern = new RegExp('\\s*' + _class + '\\s*');
    el.className = el.className.replace(pattern, ' ');
  } else if (el) {
    el.className = el.className + ' ' + _class;
  } else {
    console.log("Element not found :(")
  }
}

              
            
!
999px

Console