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HTML 

              
                <div class="wrapper">
  <div class="title">
    <h1>Gradients from Nature</h1>
    <h2>Sampled from nature. Penned by <a href="http://www.anastasiatumanova.com/" target="_blank">Anastasia Tumanova</a>.</h2>
  </div>
  <div class="time">
    <h3>Dawn</h3>
    <div class="gradient sand-babe"></div>
    <div class="gradient beach-towel"></div>
    <div class="gradient sky-blush"></div>
    <div class="gradient kentucky-dawn"></div>
    <div class="gradient slate-sunrise"></div>
    <div class="gradient blue-peach"></div>
    <div class="gradient pixy-dust"></div>
    <div class="gradient rainbow-pudding"></div>
  </div>
  <div class="time">
    <h3>Daylight</h3>
    <div class="gradient pale-elm"></div>
    <div class="gradient pastel-daylight"></div>
    <div class="gradient dolphin"></div>
    <div class="gradient field-day"></div>
    <div class="gradient seafoam-sun"></div>
    <div class="gradient brilliant-sky"></div>
    <div class="gradient mountain-time"></div>
    <div class="gradient candy-day"></div>
  </div>
  <div class="time">
    <h3>Sunset</h3>
    <div class="gradient bruised-grape"></div>
    <div class="gradient violet-blush"></div>
    <div class="gradient lavender-skies"></div>
    <div class="gradient purple-sunset"></div>
    <div class="gradient brownie"></div>
    <div class="gradient tequila-sunset"></div>
    <div class="gradient sutro"></div>
    <div class="gradient berry-juice"></div>
  </div>
  <div class="time">
    <h3>Magic Hour</h3>
    <div class="gradient indigo-magic"></div>
    <div class="gradient lady-night"></div>
    <div class="gradient mauve-hour"></div>
    <div class="gradient magic-hour"></div>
    <div class="gradient grape-soda"></div>
    <div class="gradient coyier-magic"></div>
    <div class="gradient baseball-field"></div>
    <div class="gradient miami-strip"></div>
  </div>
 </div>
!

CSS 

              
                // five tone diagonal gradient mixin

.five-tone-diagonal-gradient(@first-color, @first-color-position, 
  @second-color, @second-color-position, @third-color, @third-color-position, 
  @fourth-color, @fourth-color-position, @fifth-color, @fifth-color-position) {
    /* Old browsers */
    background: @first-color;
    /* FF3.6+ */
    background: -moz-linear-gradient(-45deg,  @first-color @first-color-position, 
      @second-color @second-color-position, @third-color @third-color-position, 
      @fourth-color @fourth-color-position, @fifth-color @fifth-color-position);
    /* Chrome,Safari4+ */
    background: -webkit-gradient(linear, left top, right bottom, 
      color-stop(@first-color-position,@first-color), 
      color-stop(@second-color-position,@second-color), 
      color-stop(@third-color-position,@third-color), 
      color-stop(@fourth-color-position,@fourth-color), 
      color-stop(@fifth-color-position,@fifth-color));
    /* Chrome10+,Safari5.1+ */
    background: -webkit-linear-gradient(-45deg, @first-color @first-color-position,
      @second-color @second-color-position,@third-color @third-color-position,
      @fourth-color @fourth-color-position,@fifth-color @fifth-color-position);
    /* Opera 11.10+ */
    background: -o-linear-gradient(-45deg, @first-color @first-color-position,
      @second-color @second-color-position,@third-color @third-color-position,
      @fourth-color @fourth-color-position,@fifth-color @fifth-color-position);
    /* IE10+ */
    background: -ms-linear-gradient(-45deg, @first-color @first-color-position,
      @second-color @second-color-position,@third-color @third-color-position,
      @fourth-color @fourth-color-position,@fifth-color @fifth-color-position);
    /* W3C */
    background: linear-gradient(135deg, @first-color @first-color-position,
      @second-color @second-color-position,@third-color @third-color-position,
      @fourth-color @fourth-color-position,@fifth-color @fifth-color-position);
}

// gradients

.time {
  .gradient {
    &.sand-babe {
      .five-tone-diagonal-gradient
        (#b3cae5, 12%, #dbdde4, 46%, #e4e3e4, 70%, #f7ddbb, 94%, #efcab2, 100%);
    }
    
    &.pale-elm {
      .five-tone-diagonal-gradient
        (#bccacc, 0%, #c7d8d6, 26%, #d9ebe0, 54%, #ebf9e3, 78%, #f4f8d0, 100%);
    }
    
    &.beach-towel {
      .five-tone-diagonal-gradient
        (#5e7fb1, 0%, #dce8f7, 61%, #eff1f4, 72%, #fce1a8, 88%, #f7ec86, 100%);
    }
    
    &.sky-blush {
      .five-tone-diagonal-gradient
        (#8fb8ee, 0%, #cbe2f4, 40%, #dbe5eb, 63%, #f9d3b8, 83%, #e0b2a3, 100%);
    }
    
    &.pastel-daylight {
      .five-tone-diagonal-gradient
        (#a2e0f9, 6%, #cef5fc, 39%, #eafaeb, 70%, #fefcd3, 88%, #fdf4ba, 100%);
    }
    
    &.blue-peach {
      .five-tone-diagonal-gradient
        (#6bafd2, 0%, #a4c8dc, 38%, #d6cbca, 58%, #eabc96, 79%, #db8876, 100%);
    }

    &.kentucky-dawn {
      .five-tone-diagonal-gradient
        (#b4ced8, 17%, #d7e5d4, 51%, #e2e8c9, 72%, #f1e5b9, 87%, #edd7ac, 100%);
    }    

    &.coyier-magic {
      .five-tone-diagonal-gradient
        (#29153e, 5%, #657489, 38%, #bfb6aa, 66%, #ead79d, 87%, #f2ebda, 100%);
    }   
    
    &.indigo-magic {
      .five-tone-diagonal-gradient
        (#20202f, 0%, #273550, 16%, #416081, 41%, #adacb2, 78%, #eac3a2, 100%);
    }
    
    &.brownie {
       .five-tone-diagonal-gradient
        (#555351, 0%, #555351, 5%, #8d7b6c, 40%, #cc9d7a, 70%, #fff9aa, 100%);
    }
    
    &.lady-night {
      .five-tone-diagonal-gradient
        (#171c33, 0%, #525f83, 42%, #848896, 63%, #bb9d78, 78%, #f6e183, 100%);
    }
    
    &.bruised-grape {
      .five-tone-diagonal-gradient
        (#ffe3c8, 0%, #efad9e, 45%, #c79797, 65%, #a78a92, 85%, #857d8d, 100%);
    }
    
    &.violet-blush {
      .five-tone-diagonal-gradient
        (#6f749e, 0%, #9a8daf, 31%, #d0a8b9, 58%, #f8bbb1, 80%, #fde6b1, 100%);
    }
    
    &.mauve-hour {
      .five-tone-diagonal-gradient
        (#536a97, 11%, #8087ad, 35%, #bca391, 72%, #bd968a, 96%, #a38b8a, 100%);
    }
    
    &.magic-hour {
      .five-tone-diagonal-gradient
        (#325176, 1%, #7b9ea7, 42%, #9baf93, 67%, #dbaf81, 85%, #fbdf73, 100%);
    }
    
    &.lavender-skies {
      .five-tone-diagonal-gradient
        (#727288, 6%, #8e889b, 29%, #d3c2bd, 70%, #f9d89a, 89%, #f8c785, 100%);
    }
    
    &.slate-sunrise {
      .five-tone-diagonal-gradient
        (#506e90, 0%, #7695aa, 37%, #a7bdb8, 56%, #e2e2b8, 79%, #fdf998, 100%);
    }

    &.grape-soda {
      .five-tone-diagonal-gradient
        (#634b5f, 0%, #868080, 34%, #b7b29b, 58%, #dfd6a4, 80%, #e9f3a2, 100%);
    }

    &.purple-sunset {
      .five-tone-diagonal-gradient
        (#7e74b2, 9%, #b3a2c2, 36%, #e2cdbe, 66%, #f6cf97, 85%, #f4a77a, 100%);
    }

    &.dolphin {
      .five-tone-diagonal-gradient
        (#34a4ca, 0%, #59d7dd, 28%, #a8f2f0, 59%, #d0f8ef, 84%, #d6f6e1, 100%);
    }

    &.field-day {
      .five-tone-diagonal-gradient
        (#7696cd, 0%, #8fb2e4, 15%, #b0cff0, 33%, #d7e5ec, 69%, #dee0e7, 92%);
    }

    &.seafoam-sun {
      .five-tone-diagonal-gradient
        (#8dd6c3, 6%, #c5e5e2, 40%, #eafaeb, 70%, #f9f7ca, 88%, #fceea1, 100%);
    }

    &.brilliant-sky {
      .five-tone-diagonal-gradient
        (#4e72c7, 0%, #6d9ed7, 34%, #a4c8d5, 67%, #b4d9e1, 84%, #c4d9d6, 100%);
    }

    &.tequila-sunset {
      .five-tone-diagonal-gradient
        (#47565f, 0%, #5b625a, 15%, #947461, 38%, #f98056, 70%, #f7ec86, 100%);
    }
    
    &.pixy-dust {
      .five-tone-diagonal-gradient
        (#95b3bf, 0%, #c6cdd3, 35%, #e5d8d9, 64%, #f1e1d9, 85%, #f3e1cd, 100%);
    }
    
    &.baseball-field {
      .five-tone-diagonal-gradient
        (#4c86ab, 0%, #95a5bc, 39%, #bfcdc9, 70%, #dcd6c9, 91%, #edd9c7, 100%);
    }
    
    &.miami-strip {
      .five-tone-diagonal-gradient
        (#0f124a, 0%, #1b2360, 16%, #515b80, 42%, #758391, 58%, #e5e3b0, 100%);
    }
    
    &.mountain-time {
      .five-tone-diagonal-gradient
        (#889db6, 0%, #a5b8ce, 20%, #c1cfdd, 42%, #dee1e4, 81%, #d5d1cf, 100%);
    }
    
    &.candy-day {
      .five-tone-diagonal-gradient
        (#74bddb, 0%, #a8d1eb, 32%, #cddbf5, 56%, #e4e6fb, 73%, #f6f4f8, 100%);
    }
    
    &.rainbow-pudding {
      .five-tone-diagonal-gradient
        (#a7d3cb, 0%, #bcc1c4, 32%, #e5cab3, 59%, #fee6c5, 89%, #fdecd0, 100%);
    }
    
    &.sutro {
      .five-tone-diagonal-gradient
        (#325571, 0%, #8e9fa4, 38%, #decab2, 66%, #f2d580, 78%, #ffa642, 100%);
    }
    
    &.berry-juice {
      .five-tone-diagonal-gradient
        (#c5d4d7, 6%, #d6b98d, 34%, #c99262, 57%, #8c5962, 80%, #43577e, 100%);
    }
  }
}

// formatting

@dark-gray: #555555;
@light-gray: #CCCCCC;
@electric-seafoam: #37DEB3;

body {
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', Helvetica, Arial, sans-serif;
  color: @dark-gray;
}

.time {
  float: left;
  width: 100%;
 
  .gradient {
    display: block;
    width: 400px;
    height: 400px;
    float: left;
    margin-right: 10px;
    margin-bottom: 10px;
    background: lighten(@light-gray, 15%);
  }
  
  &:last-child {
    margin-bottom: 30px;
  }
}

.wrapper {
  margin: 60px;
  
  .title {
    margin-bottom: 30px;
    
    h1 {
      font-weight: 300;
      font-size: 32px;
      line-height: 10px;
    }
    
    h2 {
      font-weight: 300;
      font-size: 15px;
      color: lighten(@dark-gray, 40%);
    }
    
    a {
      text-decoration: none;
      color: @electric-seafoam;
      
      &:hover {
        color: lighten(@electric-seafoam, 15%);
      }
    }  
  }

  h3 {
    font-weight: 300;
    font-size: 21px;
    color: @dark-gray;
  }
}

// responsive

@viewport {
  zoom: 1.0;
  width: extend-to-zoom;
}

@media all and (max-width: 540px){
  .wrapper {
    margin: 10px;
    
    .title {
      margin-bottom: 15px;

      h1 {
        line-height: 34px;
      }
    }  
  }
  
  .time {
    .gradient {
        width: 100%;
        height: 300px;
    }
  }
}
!

JS
!
999px

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