Modern CSS Filter Effects

Grayscale, blur, hue, sepia, duotone and glow filters for photos, logos, icons and text.

1Neon Glow

Wraps icons, logos and transparent images in a flickering neon halo using drop-shadow. Class: fx-filter-neon-glow

<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
  <div class="bg-dark rounded-4 p-4 d-flex gap-4 fs-1">
    <span class="fx-filter-neon-glow"><i class="bi bi-lightning-charge-fill" aria-hidden="true"></i></span><span class="fx-filter-neon-glow"><i class="bi bi-music-note-beamed" aria-hidden="true"></i></span><span class="fx-filter-neon-glow"><i class="bi bi-moon-stars-fill" aria-hidden="true"></i></span>
  </div>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-filter-neon-glow {
  color: var(--wt-primary-ink);
  filter: drop-shadow(0 0 4px var(--wt-primary)) drop-shadow(0 0 12px var(--wt-primary));
  animation: fx-filter-neon-glow-flicker 3s linear infinite;
}
@keyframes fx-filter-neon-glow-flicker {
  0%, 18%, 22%, 62%, 64%, 100% { filter: drop-shadow(0 0 4px var(--wt-primary)) drop-shadow(0 0 12px var(--wt-primary)); }
  20%, 63% { filter: drop-shadow(0 0 1px var(--wt-primary)); }
}
@media (prefers-reduced-motion: reduce) {
  .fx-filter-neon-glow, .fx-filter-neon-glow::before, .fx-filter-neon-glow::after, .fx-filter-neon-glow *, .fx-filter-neon-glow *::before, .fx-filter-neon-glow *::after { animation: none !important; transition: none !important; }
}

2Glitch Filter

Short bursts of hue, contrast and position jumps make an image look like a corrupted signal. Class: fx-glitch-filter

<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
  <img src="https://images.unsplash.com/photo-1758691462123-8a17ae95d203?auto=format&fit=crop&w=1200&h=800&q=70" alt="Photo with a glitch filter" class="fx-glitch-filter object-fit-cover rounded-3" style="width:200px;height:140px">
</div>

/* CSS (already in assets/css/effects.css) */
.fx-glitch-filter { animation: fx-glitch-filter-glitch 3.5s steps(1) infinite; }
@keyframes fx-glitch-filter-glitch {
  0%, 86%, 100% { filter: none; transform: none; }
  88% { filter: hue-rotate(90deg) saturate(3) contrast(1.6); transform: translate(-4px, 1px); }
  90% { filter: invert(.15) contrast(2); transform: translate(4px, -2px) skewX(6deg); }
  92% { filter: hue-rotate(-70deg) saturate(2); transform: translate(-2px, 0); }
  94% { filter: brightness(1.6); transform: translate(2px, 1px); }
}
@media (prefers-reduced-motion: reduce) {
  .fx-glitch-filter, .fx-glitch-filter::before, .fx-glitch-filter::after, .fx-glitch-filter *, .fx-glitch-filter *::before, .fx-glitch-filter *::after { animation: none !important; transition: none !important; }
}