<div class="card">
  <!-- Custom information -->
  <div class="about">
    <h3>Chart.js</h3>
    <p class="lead">Temperature in °C</p>
  </div>
  
  <!-- Canvas for Chart.js -->
  <canvas id="canvas"></canvas>
  
  <!-- Custom Axis -->
  <div class="axis">
    <div class="tick">
      <span class="day-number">10</span>
      <span class="day-name">MON</span>
      <span class="value value--this">26°C</span>
    </div>
    <div class="tick">
      <span class="day-number">11</span>
      <span class="day-name">TUE</span>
      <span class="value value--this">14°C</span>
    </div>
    <div class="tick">
      <span class="day-number">12</span>
      <span class="day-name">WED</span>
      <span class="value value--this">22°C</span>
    </div>
    <div class="tick">
      <span class="day-number">13</span>
      <span class="day-name">THU</span>
      <span class="value value--this">12°C</span>
    </div>
    <div class="tick">
      <span class="day-number">14</span>
      <span class="day-name">FRI</span>
      <span class="value value--this">20°C</span>
    </div>
    <div class="tick">
      <span class="day-number">15</span>
      <span class="day-name">SAT</span>
      <span class="value value--this">12°C</span>
    </div>
    <div class="tick">
      <span class="day-number">16</span>
      <span class="day-name">SUN</span>
      <span class="value value--this">18°C</span>
    </div>
  </div>
</div>
body {
  background-color: #f3f5f7;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

.card {
  background: linear-gradient(-45deg, #5555FF, #9787FF);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.1); 
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 300px;
  height: 375px;
  border-radius: 10px;
  overflow: hidden;
}

/* hide limit values on X axis */
.card #canvas {
  margin-left: -30px;
  margin-right: -30px;
  width: 360px!important;
}

.card .about {
  height: 185px;
  padding: 20px;
  box-sizing: border-box;
}

.card .about h3,
.card .about .lead {
  margin-top: 0;
  margin-bottom: 0;
  font-weight: 400;
}

.card .about h3 {
  font-size: 24px;
  color: #fff;
}

.card .about .lead {
  color: #eee;
}

.card .info {
  float: left;
  padding: 10px 30px 10px 0;
}

.card .info p {
  font-size: 11px;
  color: #aaa;
  font-weight: 300;
}

.legends {
  padding-top: 20px;
  overflow: hidden;
}

.legend {
  display: block;
  width: 8px;
  height: 8px;
  margin-top: 15px;
  margin-bottom: 15px;
  border-radius: 50%;
}

.legend--this {
  background-color: #5555FF;
}

.legend--prev {
  background-color: #FF55B8;
}

.axis {
  position: absolute;
  color: #fff;
  z-index: 1;
  text-transform: uppercase;
  display: flex;
  width: 100%;
  bottom: 0;
}

.axis .tick {
  flex: 1;
  position: relative;
  font-size: 11px;
  text-align: center;
  padding-top: 10px;
  padding-bottom: 10px;
  line-height: 20px;
}

.axis .tick::after {
  content: "";
  position: absolute;
  display: block;
  right: 0;
  bottom: 0;
  width: 1px;
  height: 200px;
  background: rgba(255, 255, 255, 0.2);
}

.axis .tick .value {
  transform: translateY(-240px);
  opacity: 0;
  transition: all 0.3s;
  position: absolute;
  top: 20px;
  left: 0;
  color: #fff;
  border-radius: 2px;
  width: 100%;
  line-height: 20px;
}

.axis .tick:hover .value.value--this {
  transform: translateY(-160px);
  display: block;
  opacity: 0.4;
}

.value.value--this {
  color: #fff;
  font-weight: bold;
}

.day-number {
  display: block;
}

.day-name {
  display: block;
  opacity: 0.4;
}

/* Animated background, credits: Manuel Pinto, https://codepen.io/P1N2O/pen/pyBNzX */
.card {
  background: linear-gradient(-45deg, #5555FF, #9787FF, #FF55B8, #FF8787);
  background-size: 400% 400%;
  animation: bg 20s infinite;
}

@keyframes bg
{
  0% {
		background-position: 0% 50%
	}
	50% {
		background-position: 100% 50%
	}
	100% {
		background-position: 0% 50%
	}
}

var canvas = document.getElementById("canvas");

// Apply multiply blend when drawing datasets
var multiply = {
  beforeDatasetsDraw: function(chart, options, el) {
    chart.ctx.globalCompositeOperation = 'multiply';
  },
  afterDatasetsDraw: function(chart, options) {
    chart.ctx.globalCompositeOperation = 'source-over';
  },
};

// Gradient color - this week
var gradientThisWeek = canvas.getContext('2d').createLinearGradient(0, 0, 0, 150);
gradientThisWeek.addColorStop(0, '#5555FF');
gradientThisWeek.addColorStop(1, '#9787FF');

// Gradient color - previous week
var gradientPrevWeek = canvas.getContext('2d').createLinearGradient(0, 0, 0, 150);
gradientPrevWeek.addColorStop(0, '#FF55B8');
gradientPrevWeek.addColorStop(1, '#FF8787');

var config = {
    type: 'line',
    data: {
        labels: ["SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT", "SUN", "MON"],
        datasets: [
          {
              label: 'Temperature',
              data: [18, 26, 14, 22, 12, 20, 12, 18, 10],
              fill: false,
              borderColor: 'rgba(255, 255, 255, 0.2)',
              borderWidth: 2,
              pointBackgroundColor: 'transparent',
              pointBorderColor: '#FFFFFF',
              pointBorderWidth: 3,
              pointHoverBorderColor: 'rgba(255, 255, 255, 0.2)',
              pointHoverBorderWidth: 10,
              lineTension: 0,
          }
        ]
    },
    options: {
    	responsive: false,
      elements: { 
        point: {
          radius: 6,
          hitRadius: 6, 
          hoverRadius: 6 
        } 
      },
      legend: {
        display: false,
      },
      tooltips: {
      	backgroundColor: 'transparent',
        displayColors: false,
        bodyFontSize: 14,
        callbacks: {
          label: function(tooltipItems, data) { 
            return tooltipItems.yLabel + '°C';
          }
        }
      },
      scales: {
        xAxes: [{
          display: false,
        }],
        yAxes: [{
          display: false,
          ticks: {
            beginAtZero: true,
          },
        }]
      }
    },
    plugins: [multiply],
};

window.chart = new Chart(canvas, config);

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.0/Chart.js