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HTML

              
                <header>
  <h1>Automagic <span>C</span><span>o</span><span>l</span><span>o</span><span>r</span> Palette</h1>
  <p>Dynamic color style guide created from LESS variables</p>
</header>

<section class="color-palette">
  <h2>Color Group Name</h2>
  <p>Brief usage description, Lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>
  <ul class="example">
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
  </ul>
  <h2>Example Colors</h2>
  <p>Color name and value are automatically appended via CSS, and conditionally colored based on the original value, to ensure readability.</p>
  <ul class="quantity-example">
    <li></li>
    <li></li>
    <li></li>
  </ul>
  <h2>Quantity Example</h2>
  <p>Groups of colors can vary in quantity and the grid will automatically adapt.</p>
  <ul class="gray">
    <li></li>
  </ul>
</section>
              
            
!

CSS

              
                // Colors Mixin
.colors (@color) {
   .-(@i: length(@color)) when (@i > 0) {
        @name: e(extract(@color, @i));
        li:nth-child(@{i}) {
          background: @@name;// the color!
          
          @dark: darken(saturate(@@name, 100%), 70%);// create new dark color
          @mid: darken(saturate(@@name, 100%), 50%);// create new mid color
          @light: lighten(@@name, 55%);// create new light color
          @bright: lighten(@@name, 70%);// create new really light color
          .mixin (@colorVal) when (lightness(@colorVal) >= 80%) {color: @dark;}// when really light lightness
          .mixin (@colorVal) when (lightness(@colorVal) < 80%)
                             and (lightness(@colorVal) > 69%) {color: @mid;}// when light lightness
          .mixin (@colorVal) when (lightness(@colorVal) <= 69%)
                             and (lightness(@colorVal) > 36%)
                             and (hue(@colorVal) >= 40%)
                             and (hue(@colorVal) <= 75%) {color:@mid;}// when mid lightness, but yellow
          .mixin (@colorVal) when (lightness(@colorVal) <= 69%)
                             and (lightness(@colorVal) > 36%)
                             and (hue(@colorVal) < 40%) {color: @light;}// when mid lightness
          .mixin (@colorVal) when (lightness(@colorVal) <= 69%)
                             and (lightness(@colorVal) > 36%)
                             and (hue(@colorVal) > 75%) {color: @light;}// when mid lightness
          .mixin (@colorVal) when (lightness(@colorVal) <= 36%) {color: @bright;}// when dark lightness
          .mixin(@@name);
          
          &:before {content: "@{name}"}// show color variable name
          &:after {content: %("%a", @@name);}// show color variable value
        }
        .-((@i - 1));
    } .-;
    @quantity: length(@color);// number of colors in list
    li {#grid > .span(12/@quantity);}// set grid span
}

// Color Variables
@coolBlue:#389aff;

@cosmicOrange:#f16745;
@canaryYellow:#ffe25d;
@mintGreen:#7bc8a4;
@oceanBlue:#4cc3d9;
@orchidPurple:#93648d;
@plainJane:#404040;

@rocketRed:#bf2431;
@purple:#5e308c;
@forestGreen:#197359;

.color-palette {
  ul.gray {.colors ('coolBlue';);}
  ul.example {.colors ('cosmicOrange','canaryYellow','mintGreen','oceanBlue','orchidPurple','plainJane';);}
  ul.quantity-example {.colors ('rocketRed','purple','forestGreen';);}
}




// Irrelevant Styling
html,
body {
    font-size: 10px;
    background: #e5ebf4;
    font-family: 'Open Sans', sans-serif;
}

body {margin:0;}

* {box-sizing: border-box;}

h1 {
  position:relative;
  margin:0 auto 15px;
  width:auto;
  padding-bottom:15px;
  font-size:4.1rem;
  font-weight:300;
  letter-spacing: -0.15rem;
  &:after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0;
  height: 2px;
  width: 100%;
  background: #bf616a;
  background: linear-gradient(left, transparent 0%,#bf616a 50%,transparent 100%);
 }
  span {
    &:nth-of-type(1) {color:white}
    &:nth-of-type(2) {color:yellow}
    &:nth-of-type(3) {color:#ff005a}
    &:nth-of-type(4) {color:#00d2ff}
    &:nth-of-type(5) {color:#00ff8a}
  }
}
h2 {margin:0;font-size:1.8rem;font-weight:600;}
p {font-size:1.65rem;margin:0 0 5px 0;font-weight:400;}

header {
  background:#2b303b;
  text-align:center;
  padding:34px;
  h1 {color:#c0c5ce}
  p {color:#96b5b4;margin-bottom:12px;}
}

section {
    position:relative;
    padding:1.2rem 1.2rem 0;
    width:80%;
    @media @tablet {width:90%}
    @media @mobile {width:96%}
    margin:30px auto;
    @clrTop:#fff;
    @clrBottom: #e5ebf4;
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(@clrTop), to(@clrBottom)); // Safari 4-5, Chrome 1-9
    background: -webkit-linear-gradient(top, @clrBottom, @clrTop); // Safari 5.1, Chrome 10+
    background: -moz-linear-gradient(top, @clrBottom, @clrTop); // Firefox 3.6+
    background: -ms-linear-gradient(top, @clrBottom, @clrTop); // IE 10
    background: -o-linear-gradient(top, @clrBottom, @clrTop); // Opera 11.10+
    background-color: #fff;
    background-size: 100% 100px;
    background-repeat: no-repeat;
    border: 2px solid white;
    border-radius: 24px;
    box-shadow: 0 0 14px #bec9d8;
    &:before {
        content: "";
        position: absolute;
        z-index: -1;
        width: 96%;
        bottom: 0;
        height: 20px;
        left: 2%;
        padding-bottom:0px;
        border-bottom: 2px solid red;
        border-radius: 50%;
        box-shadow: 0 0 0px 3px #bbb, 0 0 0px 4px #eee, 0 0 0px 6px #fff, 0 0 32px #101215;
    } // shadow
  > *:last-child {margin-bottom:0;}
} // section

ul {
    #grid;
    list-style:none;
    padding:0;
    margin-bottom:12px;
    li {
        #grid > .cell;
        &:before {
            display: block;
            font-weight: bold;
        }
        border-radius:12px;
        padding:10px 0;
        text-align:center;
    } // li
} // ul




/*  THE GRID justifygrid.com  */
@columns: 12;
@column-width: 4rem;
@gutter-width: 1.2rem;
@support-old-ie: false;
#grid() {
    text-align: justify !important;
    text-justify: distribute-all-lines;
    font-size: 0 !important;
    & > * {
        text-align: left;
        font-size: medium;
    }
    &:after {
        content: '';
        display: inline-block;
        width: 100%;
    }
    .cell() {
        vertical-align: top;
        display: inline-block;
        width: 100%;
    }
    .span(@cols,
    @total: @columns) {
        width: percentage((@column-width * @cols + @gutter-width * (@cols - 1)) / (@column-width * @total + @gutter-width * (@total - 1)));
        margin-bottom: 1.2rem;
        @media @desktop {min-width: 23.52941176%;}
        @media @tablet {min-width: 32.02614379%}
        @media @mobile {min-width: 100%}
    }
    .push(@cols,
    @total: @columns) {
        left: percentage((@column-width + @gutter-width) * @cols / (@column-width * @total + @gutter-width * (@total - 1)));
    }
    .pull(@cols,
    @total: @columns) {
        left: percentage((@column-width + @gutter-width) * -@cols / (@column-width * @total + @gutter-width * (@total - 1)));
    }
    .prepend(@cols,
    @total: @columns) {
        margin-left: percentage((@column-width + @gutter-width) * @cols / (@column-width * @total + @gutter-width * (@total - 1)));
    }
    .append(@cols,
    @total: @columns) {
        margin-right: percentage((@column-width + @gutter-width) * @cols / (@column-width * @total + @gutter-width * (@total - 1)));
    }
}

@mobile: ~"only screen and (max-width: 529px)";
@tablet: ~"only screen and (min-width: 530px) and (max-width: 768px)";
@desktop:     ~"only screen and (min-width: 769px) and (max-width: 1128px)";
              
            
!

JS

              
                
              
            
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