@keyframes rainbow {
    0% {
        color: red;
        text-shadow: 0 0 0.25em rgba(255, 71, 71, 1);
    }
    10% {
        color: #ff9900;
        text-shadow: 0 0 0.25em rgba(255, 182, 71, 1);
    }
    20% {
        color: #ccff00;
        text-shadow: 0 0 0.25em rgba(218, 255, 71, 1);
    }
    30% {
        color: #33ff00;
        text-shadow: 0 0 0.25em rgba(108, 255, 71, 1);
    }
    40% {
        color: #00ff66;
        text-shadow: 0 0 0.25em rgba(71, 255, 145, 1);
    }
    50% {
        color: cyan;
        text-shadow: 0 0 0.25em rgba(71, 255, 255, 1);
    }
    60% {
        color: #0066ff;
        text-shadow: 0 0 0.25em rgba(71, 145, 255, 1);
    }
    70% {
        color: #3300ff;
        text-shadow: 0 0 0.25em rgba(108, 71, 255, 1);
    }
    80% {
        color: #cc00ff;
        text-shadow: 0 0 0.25em rgba(218, 71, 255, 1);
    }
    90% {
        color: #ff0099;
        text-shadow: 0 0 0.25em rgba(255, 71, 182, 1);
    }
    100% {
        color: red;
        text-shadow: 0 0 0.25em rgba(255, 71, 71, 1);
    }
}

@-webkit-keyframes rainbow {
    0% {
        color: red;
        text-shadow: 0 0 0.25em rgba(255, 71, 71, 1);
    }
    10% {
        color: #ff9900;
        text-shadow: 0 0 0.25em rgba(255, 182, 71, 1);
    }
    20% {
        color: #ccff00;
        text-shadow: 0 0 0.25em rgba(218, 255, 71, 1);
    }
    30% {
        color: #33ff00;
        text-shadow: 0 0 0.25em rgba(108, 255, 71, 1);
    }
    40% {
        color: #00ff66;
        text-shadow: 0 0 0.25em rgba(71, 255, 145, 1);
    }
    50% {
        color: cyan;
        text-shadow: 0 0 0.25em rgba(71, 255, 255, 1);
    }
    60% {
        color: #0066ff;
        text-shadow: 0 0 0.25em rgba(71, 145, 255, 1);
    }
    70% {
        color: #3300ff;
        text-shadow: 0 0 0.25em rgba(108, 71, 255, 1);
    }
    80% {
        color: #cc00ff;
        text-shadow: 0 0 0.25em rgba(218, 71, 255, 1);
    }
    90% {
        color: #ff0099;
        text-shadow: 0 0 0.25em rgba(255, 71, 182, 1);
    }
    100% {
        color: red;
        text-shadow: 0 0 0.25em rgba(255, 71, 71, 1);
    }
}

.rainbow {
    /*animation: rainbow 2s ease-out infinite alternate;
    -webkit-animation: rainbow 2s ease-out infinite alternate;*/
}