Neon Glow Spinner
A half ring with a soft outer glow and an inner bloom, like a neon tube. Best on a dark background, where the glow has somewhere to go.
Also known as: glowing spinner, neon loader.
HTML
<div class="ldr-neon-ring" role="status" aria-label="Loading"></div>
CSS
.ldr-neon-ring {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
width: var(--s);
height: var(--s);
border: calc(var(--s) / 12) solid transparent;
border-top-color: var(--c);
border-right-color: var(--c);
border-radius: 50%;
box-shadow: 0 0 calc(var(--s) / 4) color-mix(in srgb, var(--ldr-color, #3b82f6) 55%, transparent), inset 0 0 calc(var(--s) / 4) color-mix(in srgb, var(--ldr-color, #3b82f6) 30%, transparent);
filter: drop-shadow(0 0 calc(var(--s) / 10) var(--c));
animation: ldr-neon-ring-spin 1s linear infinite;
}
@keyframes ldr-neon-ring-spin {
to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-neon-ring, .ldr-neon-ring *, .ldr-neon-ring::before, .ldr-neon-ring::after {
animation-duration: 3s;
}
}Customizing this loader
- Color: set
--ldr-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--ldr-size. Every dimension in the snippet is derived from it. Currently previewing64px. - Speed: change the duration on the
animationshorthand. Delays on the children are relative, so they keep their rhythm. - Accessibility: the root carries
role="status"and anaria-labelso screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.