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; }
}2Saturation Boost
Desaturated at rest, vivid on hover - draws attention to the product the visitor is looking at. Class: fx-saturation-boost
<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
<img src="../assets/img/product-5.svg" alt="Product with boosted colour" class="fx-saturation-boost rounded-3 object-fit-cover" style="width:120px;height:120px"><img src="../assets/img/product-6.svg" alt="Second product" class="fx-saturation-boost rounded-3 object-fit-cover" style="width:120px;height:120px">
</div>
/* CSS (already in assets/css/effects.css) */
.fx-saturation-boost { filter: saturate(.6); transition: filter .4s ease, transform .4s ease; }
.fx-saturation-boost:hover, .fx-saturation-boost:focus-visible { filter: saturate(1.8); transform: scale(1.03); }
@media (prefers-reduced-motion: reduce) {
.fx-saturation-boost, .fx-saturation-boost::before, .fx-saturation-boost::after, .fx-saturation-boost *, .fx-saturation-boost *::before, .fx-saturation-boost *::after { animation: none !important; transition: none !important; }
}3Advanced Combo
A figure whose blurred, muted image sharpens and zooms on hover while a frosted caption slides up. Class: fx-advanced-combo
<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
<figure class="fx-advanced-combo rounded-3">
<img src="https://images.unsplash.com/photo-1596247290824-e9f12b8c574f?auto=format&fit=crop&w=1200&h=800&q=70" alt="Featured story" class="object-fit-cover" style="width:220px;height:150px">
<figcaption class="small fw-semibold">Looking back at a busy season</figcaption>
</figure>
</div>
/* CSS (already in assets/css/effects.css) */
.fx-advanced-combo { position: relative; overflow: hidden; display: inline-block; margin: 0; }
.fx-advanced-combo img { display: block; filter: grayscale(.5) blur(1px) brightness(.85); transform: scale(1.05); transition: filter .5s, transform .6s; }
.fx-advanced-combo figcaption {
position: absolute; left: 0; right: 0; bottom: 0; padding: .6rem .8rem; color: #fff;
background: rgba(0, 0, 0, .35); -webkit-backdrop-filter: blur(8px) saturate(1.4); backdrop-filter: blur(8px) saturate(1.4);
transform: translateY(100%); transition: transform .45s cubic-bezier(.2, .8, .2, 1);
}
.fx-advanced-combo:hover img, .fx-advanced-combo:focus-within img { filter: none; transform: scale(1.12); }
.fx-advanced-combo:hover figcaption, .fx-advanced-combo:focus-within figcaption { transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
.fx-advanced-combo, .fx-advanced-combo::before, .fx-advanced-combo::after, .fx-advanced-combo *, .fx-advanced-combo *::before, .fx-advanced-combo *::after { animation: none !important; transition: none !important; }
}