Plantilla Que Diseñé en Exclusiva para usuarios de Forobeta

<style>
* {
  box-sizing: border-box;
  outline: none;
}


.box {
  margin: 1rem;
  width: 18.75rem;
}
.box img {
  width: 100%;
}

.btn {
  border: none;
  color: white;
  overflow: hidden;
  padding: 0;
  text-transform: uppercase;
  width: 150px;
  height: 40px;
}
.btn.color-1 {
  background-color: #1F313B;
}
.btn.color-2 {
  background-color: #00897b;
}
.btn.color-3 {
  background-color: #f6774f;
}
.btn.color-4 {
  background-color: #e94043;
}

.btn-border.color-1 {
  background-color: transparent;
  border: 2px solid #426FC5;
  color: #426FC5;
}
.btn-border.color-2 {
  background-color: transparent;
  border: 2px solid #00897b;
  color: #00897b;
}
.btn-border.color-3 {
  background-color: transparent;
  border: 2px solid #f6774f;
  color: #f6774f;
}
.btn-border.color-4 {
  background-color: transparent;
  border: 2px solid #e94043;
  color: #e94043;
}

.btn-round {
  border-radius: 10em;
}

.material-design {
  position: relative;
}
.material-design canvas {
  opacity: 0.25;
  position: absolute;
  top: 0;
  left: 0;
}

.btncontainer {
  align-items: flex-start;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0 auto;
  max-width: 46rem;
}

</style>

<section class="btncontainer">
  <button class="btn color-1 material-design" data-color="#2f5398">Botón</button>
<script type="text/javascript">
var canvas = {},
    centerX = 0,
    centerY = 0,
    color = '',
    containers = document.getElementsByClassName('material-design')
    context = {},
    element = {},
    radius = 0,

    requestAnimFrame = function () {
      return (
        window.requestAnimationFrame       || 
        window.mozRequestAnimationFrame    || 
        window.oRequestAnimationFrame      || 
        window.msRequestAnimationFrame     || 
        function (callback) {
          window.setTimeout(callback, 1000 / 60);
        }
      );
    } (),
      
    init = function () {
      containers = Array.prototype.slice.call(containers);
      for (var i = 0; i < containers.length; i += 1) {
        canvas = document.createElement('canvas');
        canvas.addEventListener('click', press, false);
        containers[i].appendChild(canvas);
        canvas.style.width ='100%';
        canvas.style.height='100%';
        canvas.width  = canvas.offsetWidth;
        canvas.height = canvas.offsetHeight;
      }
    },
      
    press = function (event) {
      color = event.toElement.parentElement.dataset.color;
      element = event.toElement;
      context = element.getContext('2d');
      radius = 0;
      centerX = event.offsetX;
      centerY = event.offsetY;
      context.clearRect(0, 0, element.width, element.height);
      draw();
    },
      
    draw = function () {
      context.beginPath();
      context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
      context.fillStyle = color;
      context.fill();
      radius += 2;
      if (radius < element.width) {
        requestAnimFrame(draw);
      }
    };

init();

</script>