btn

by Andrey Izman

HTML

<button class="tool_btn button_blink">Tets btn</button>

CSS

body {
  padding: 50px;
}
.button_blink {
  animation: shadow-pulse 1s infinite;
}
.tool_btn {
  color: #fff;
  border: 0!important;
  background-color: #1e70b9;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  outline: none;
  height: 46px;
  min-width: 160px;
}
.tool_btn {
  background-color: rgb(24, 90, 148);
  text-decoration-color: initial;
  outline-color: initial;
}

@keyframes shadow-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(30,112,185);
  }
  100% {
    box-shadow: 0 0 0 15px transparent;
  }
}