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CSS

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CSS Base

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HTML 

              
                <div class="span4">
  <div class="todo mrm">
    <div class="todo-header">
      <h3 class="demo-panel-title">Flat Colors</h3>
    </div>
      <ul>
        <li class="todo-wrap one">
          <div class="todo-content">
            <h4 class="todo-name">
              GREEN SEA
            </h4>
              #16A085
          </div>
        </li>

        <li class="todo-wrap two">
          <div class="todo-content">
            <h4 class="todo-name">
              EMERLAND
            </h4>
              #2ECC71
          </div>
        </li>

        <li class="todo-wrap three">
          <div class="todo-content">
            <h4 class="todo-name">
              NEPHRITIS
            </h4>
              #27AE60
          </div>
        </li>
        
        <li class="todo-wrap four">
          <div class="todo-content">
            <h4 class="todo-name">
              PETER RIVER
            </h4>
              #3498DB
          </div>
        </li>
        
        <li class="todo-wrap five">
          <div class="todo-content">
            <h4 class="todo-name">
              BELIZE HOLE
            </h4>
              #2980B9
          </div>
        </li>
        
        <li class="todo-wrap six">
          <div class="todo-content">
            <h4 class="todo-name">
              AMETHYST
            </h4>
              #9B59B6
          </div>
        </li>
        
        <li class="todo-wrap seven">
          <div class="todo-content">
            <h4 class="todo-name">
              WISTERIA
            </h4>
              #8E44AD
          </div>
        </li>
        
        <li class="todo-wrap eight">
          <div class="todo-content">
            <h4 class="todo-name">
              WET ASPHALT
            </h4>
              #34495E
          </div>
        </li>
        
        <li class="todo-wrap nine">
          <div class="todo-content">
            <h4 class="todo-name">
              MIDNIGHT BLUE
            </h4>
              #2C3E50
          </div>
        </li>

        <li class="todo-wrap ten">
          <div class="todo-content">
            <h4 class="todo-name">
              NIGHT SHADE
            </h4>
              #2C3E50
          </div>
        </li>
        
        <li class="todo-wrap elleven">
          <div class="todo-content">
            <h4 class="todo-name">
              SUN FLOWER
            </h4>
              #F1C40F
          </div>
        </li>
        
        <li class="todo-wrap twelve">
          <div class="todo-content">
            <h4 class="todo-name">
              ORANGE
            </h4>
              #F39C12
          </div>
        </li>
        
        <li class="todo-wrap thirteen">
          <div class="todo-content">
            <h4 class="todo-name">
              CARROT
            </h4>
              #E67E22
          </div>
        </li>
        
        <li class="todo-wrap fourteen">
          <div class="todo-content">
            <h4 class="todo-name">
              PUMPKIN
            </h4>
              #D35400
          </div>
        </li>
        
        <li class="todo-wrap fifteen">
          <div class="todo-content">
            <h4 class="todo-name">
              ALIZARIN
            </h4>
              #E74C3C
          </div>
        </li>
        
        <li class="todo-wrap sixteen">
          <div class="todo-content">
            <h4 class="todo-name">
              POMEGRANATE
            </h4>
              #C0392B
          </div>
        </li>
        
        <li class="todo-wrap seventeen clouds">
          <div class="todo-content">
            <h4 class="todo-name clouds">
              CLOUDS
            </h4>
              #ECF0F1
          </div>
        </li>
        
        <li class="todo-wrap eighteen">
          <div class="todo-content">
            <h4 class="todo-name">
              SILVER
            </h4>
              #BDC3C7
          </div>
        </li>
        
        <li class="todo-wrap nineteen">
          <div class="todo-content">
            <h4 class="todo-name">
              CONCRETE
            </h4>
              #95A5A6
          </div>
        </li>
        
        <li class="todo-wrap twenty">
          <div class="todo-content">
            <h4 class="todo-name">
              ASBESTOS
            </h4>
              #7F8C8D
          </div>
        </li>
      </ul>
  </div>
</div>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Lato:700);

body {
color: #34495e;
font: 14px/1.231 "Lato", sans-serif; }

h3 {
font-size: 19px;
font-weight: 700;
line-height: 23px; 
margin: 0;
padding: 10px 0;
text-rendering: optimizelegibility;}

h4 {
font-size: 18px;
font-weight: 500;
margin-top: 4px;
line-height: 20px;
text-rendering: optimizelegibility;}

.span4 {
width: 250px; }

[class*="span"] {
float: left;
min-height: 1px;
margin-left: 20px; }

.mrm, .mhm, .mam {
margin-right: 10px; }

.todo {
background-color: #2c3e50;
border-radius: 8px 8px 6px 6px;
color: #fff;
margin-bottom: 20px; }

.todo-header {
background: #1ABC9C 92% center no-repeat;
background-size: 16px 16px;
border-radius: 6px 6px 0 0;
color: #34495e;
padding: 10px 20px; }

.todo ul {
margin: 0;
list-style-type: none;
padding: 0;
display: block; }

.todo-name {
color: #FFF;
font-size: 17px;
margin: 1px 0 3px; }

.todo-name.clouds {
color: #BDC3C7; }

.todo li.todo-done {
background: transparent 92% center no-repeat;
background-size: 20px 20px;
color: #1abc9c; }

.todo li:first-child {
margin-top: 0; }

.todo li:last-child {
border-radius: 0 0 6px 6px;
padding-bottom: 18px; }

.todo-wrap {
background-size: 20px 20px;
cursor: pointer;
padding: 10px 18px;
position: relative;
-webkit-transition: 0.25s;
-moz-transition: 0.25s;
-o-transition: 0.25s;
transition: 0.25s;
-webkit-backface-visibility: hidden; }

.one {
background: #16A085; }

.two {
background: #2ECC71; }

.three {
background: #27AE60; }

.four {
background: #3498DB; }

.five {
background: #2980B9; }

.six {
background: #9B59B6; }

.seven {
background: #8E44AD; }

.eight {
background: #34495E; }

.nine {
background: #2C3E50; }

.ten {
background: #22313f; }

.elleven {
background: #F1C40F; }

.twelve {
background: #F39C12; }

.thirteen {
background: #E67E22; }

.fourteen {
background: #D35400; }

.fifteen {
background: #E74C3C; }

.sixteen {
background: #C0392B; }

.seventeen {
background: #ECF0F1; }

.seventeen.clouds {
color: #BDC3C7; }

.eighteen {
background: #BDC3C7; }

.nineteen {
background: #95A5A6; }

.twenty {
background: #7F8C8D; }
!

JS
!
999px

Console