Glow In Text Effect
Letters switch on one by one as bright, glowing shapes, then cool down to the plain text color as the bloom fades. The glow is a two-layer text-shadow that shrinks to nothing.
Also known as: glowing text reveal, light up letters css, letters glow in.
Lights on
HTML
<div class="txt-glow-in-text" aria-label="Lights on"><span style="--i: 0">L</span><span style="--i: 1">i</span><span style="--i: 2">g</span><span style="--i: 3">h</span><span style="--i: 4">t</span><span style="--i: 5">s</span><span style="--i: 6"> </span><span style="--i: 7">o</span><span style="--i: 8">n</span></div>
CSS
.txt-glow-in-text {
--c: var(--txt-color, #3b82f6);
font-size: var(--txt-size, 32px);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
color: var(--c);
white-space: nowrap;}
.txt-glow-in-text span {
animation: txt-glow-in-text-on 1.3s ease-out calc(var(--i) * 110ms) both;
}
@keyframes txt-glow-in-text-on {
0% {
opacity: 0;
color: color-mix(in srgb, var(--c) 35%, #fff);
text-shadow: 0 0 0.08em var(--c), 0 0 0.5em var(--c);
}
20% {
opacity: 1;
color: color-mix(in srgb, var(--c) 35%, #fff);
text-shadow: 0 0 0.08em var(--c), 0 0 0.5em var(--c);
}
100% {
opacity: 1;
color: var(--c);
text-shadow: 0 0 0 transparent, 0 0 0 transparent;
}
}
@media (prefers-reduced-motion: reduce) {
.txt-glow-in-text, .txt-glow-in-text *, .txt-glow-in-text::before, .txt-glow-in-text::after, .txt-glow-in-text *::before, .txt-glow-in-text *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--txt-coloron the element or a parent. Currently previewing#3b82f6. - Font size: set
--txt-size. Every other dimension is inem, so the whole thing scales together. Currently previewing40px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.