Modern CSS Filter Effects
Grayscale, blur, hue, sepia, duotone and glow filters for photos, logos, icons and text.
1Brightness & Contrast
Images start slightly muted and pop with extra brightness and contrast on hover. Class: fx-brightness-contrast
<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
<img src="../assets/img/photo-2.svg" alt="Photo that brightens on hover" class="fx-brightness-contrast object-cover rounded-lg" style="width:200px;height:140px">
</div>
/* CSS (already in assets/css/effects.css) */
.fx-brightness-contrast { filter: brightness(.82) contrast(.9); transition: filter .45s ease, transform .45s ease; }
.fx-brightness-contrast:hover, .fx-brightness-contrast:focus-visible { filter: brightness(1.12) contrast(1.2); transform: scale(1.02); }
@media (prefers-reduced-motion: reduce) {
.fx-brightness-contrast, .fx-brightness-contrast::before, .fx-brightness-contrast::after, .fx-brightness-contrast *, .fx-brightness-contrast *::before, .fx-brightness-contrast *::after { animation: none !important; transition: none !important; }
}2Hue Rotation
Continuously cycles the colours of a gradient, illustration or image through the colour wheel. Class: fx-hue-rotation
<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
<div class="fx-hue-rotation rounded-full" style="width:96px;height:96px;background:linear-gradient(135deg, var(--wt-primary), var(--wt-accent))">
</div>
<img src="../assets/img/photo-3.svg" alt="Photo cycling through hues" class="fx-hue-rotation object-cover rounded-lg" style="width:150px;height:110px">
</div>
/* CSS (already in assets/css/effects.css) */
.fx-hue-rotation { animation: fx-hue-rotation-hue 8s linear infinite; }
@keyframes fx-hue-rotation-hue { to { filter: hue-rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
.fx-hue-rotation, .fx-hue-rotation::before, .fx-hue-rotation::after, .fx-hue-rotation *, .fx-hue-rotation *::before, .fx-hue-rotation *::after { animation: none !important; transition: none !important; }
}3Neon Glow
Wraps icons, logos and transparent images in a flickering neon halo using drop-shadow. Class: fx-filter-neon-glow
<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
<div class="bg-dark rounded-xl p-6 flex gap-6 text-4xl">
<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);
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; }
}