Blinking animation like FLASH on text or image

HTML

<button href="#" class="winner-btn"> Ajinkya Mopkar</button>

CSS

button {
    animation-duration: 2s;
    animation-name: blink;
    animation-iteration-count: infinite;
    animation-direction: alternate;
    -webkit-animation-duration:2s;
    -webkit-animation-name: blink;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-direction: alternate;
}
.winner-btn {
  background-color: #fefe1f;
    box-shadow: none;
    display: inline-block;
    padding: 10px 20px;

}
@-webkit-keyframes blink {
    from {
        opacity: 1;
        color:#ec3237 ;
    }
    to {
        opacity: 0;
    }
}
@keyframes blink {
    from {
        opacity: 1;
        color:#ec3237 ;
    }
    to {
        opacity: 0;
    }
}