.css-selector {
background: linear-gradient(115deg, #51ae96, #1f54d5, #bc1fd5, #eed613);
background-size: 800% 800%;
-webkit-animation: AnimationName 10s ease infinite;
-moz-animation: AnimationName 10s ease infinite;
animation: AnimationName 10s ease infinite;
}
@-webkit-keyframes AnimationName {
0%{background-position:0% 20%}
50%{background-position:100% 81%}
100%{background-position:0% 20%}
}
@-moz-keyframes AnimationName {
0%{background-position:0% 20%}
50%{background-position:100% 81%}
100%{background-position:0% 20%}
}
@keyframes AnimationName {
0%{background-position:0% 20%}
50%{background-position:100% 81%}
100%{background-position:0% 20%}
}