Rainbow Border Spin
A conic-gradient border spins continuously using the CSS mask-composite technique.
Rainbow Border Spin the 15th of 21 designs in the 21 CSS Button Hover Effects collection. The design is implemented in pure CSS — no JavaScript required. Copy the HTML and CSS panels below into your project. Because the demo is pure CSS, it works in any framework or templating engine you happen to use. The design honours prefers-reduced-motion and uses real semantic markup, so it ships accessibility-ready out of the box.
Live preview
The code
<button class="bhe-15__btn">Hover Me</button>
.bhe-15__btn {
font-size: 13.5px;
font-family: inherit;
font-weight: 500;
cursor: pointer;
letter-spacing: 0.02em;
color: inherit;
background: transparent;
}
.bhe-15__btn {
position: relative;
border: none;
}
.bhe-15__btn::before {
content: "";
position: absolute;
inset: 0;
border-radius: 8px;
padding: 2px;
background: conic-gradient(#7c6cff, #ff6c8a, #2ecc8a, #f5a623, #7c6cff);
-webkit-mask:
linear-gradient(#fff 0 0) content-box,
linear-gradient(#fff 0 0);
-webkit-mask-composite: xor;
mask-composite: exclude;
opacity: 0;
transition: opacity 0.3s;
}
.bhe-15__btn:hover::before {
opacity: 1;
animation: spin 2s linear infinite;
}
@keyframes spin {
to {
transform: rotate(360deg);
}
}
@media (prefers-reduced-motion: reduce) {
.bhe-15__btn,
.bhe-15__btn * {
animation: none !important;
}
}