Modern CSS Filter Effects
Grayscale, blur, hue, sepia, duotone and glow filters for photos, logos, icons and text.
1Hue Rotation
Continuously cycles the colours of a gradient, illustration or image through the colour wheel. Class: fx-hue-rotation
<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
<div class="fx-hue-rotation rounded-circle" style="width:96px;height:96px;background:linear-gradient(135deg, var(--wt-primary), var(--wt-accent))">
</div>
<img src="https://images.unsplash.com/photo-1599058917212-d750089bc07e?auto=format&fit=crop&w=1200&h=800&q=70" alt="Photo cycling through hues" class="fx-hue-rotation object-fit-cover rounded-3" 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; }
}2Sepia Vintage
An old-photo look with sepia tones and a soft vignette; works on an img or a wrapper around one. Class: fx-sepia-vintage
<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-sepia-vintage rounded-3 mb-0">
<img src="https://images.unsplash.com/photo-1758875569612-94d5e0f1a35f?auto=format&fit=crop&w=1200&h=800&q=70" alt="Vintage style photo" class="d-block object-fit-cover" style="width:210px;height:145px">
</figure>
</div>
/* CSS (already in assets/css/effects.css) */
.fx-sepia-vintage { position: relative; display: inline-block; overflow: hidden; }
img.fx-sepia-vintage, .fx-sepia-vintage img { filter: sepia(.75) contrast(1.1) brightness(.95) saturate(.85); transition: filter .5s ease; }
.fx-sepia-vintage::after { content: ""; position: absolute; inset: 0; pointer-events: none; box-shadow: inset 0 0 50px rgba(60, 35, 10, .55); border-radius: inherit; }
img.fx-sepia-vintage:hover, .fx-sepia-vintage:hover img { filter: sepia(0) contrast(1) brightness(1) saturate(1); }
@media (prefers-reduced-motion: reduce) {
.fx-sepia-vintage, .fx-sepia-vintage::before, .fx-sepia-vintage::after, .fx-sepia-vintage *, .fx-sepia-vintage *::before, .fx-sepia-vintage *::after { animation: none !important; transition: none !important; }
}3Invert Colors
Flips an image or card to its negative on hover while hue-rotate keeps the colours recognisable. Class: fx-invert-colors
Looking back at a busy season
<div class="d-flex flex-wrap align-items-center justify-content-center gap-3 p-3 h-100" style="min-height:200px">
<div class="card fx-invert-colors" style="width:12rem">
<img src="https://images.unsplash.com/photo-1689877020200-403d8542d95d?auto=format&fit=crop&w=1200&h=800&q=70" alt="Card photo" class="card-img-top object-fit-cover" style="height:110px">
<div class="card-body py-2">
<p class="small mb-0 fw-semibold">Looking back at a busy season</p>
</div>
</div>
</div>
/* CSS (already in assets/css/effects.css) */
.fx-invert-colors { transition: filter .4s ease; }
.fx-invert-colors:hover, .fx-invert-colors:focus-visible { filter: invert(1) hue-rotate(180deg); }
@media (prefers-reduced-motion: reduce) {
.fx-invert-colors, .fx-invert-colors::before, .fx-invert-colors::after, .fx-invert-colors *, .fx-invert-colors *::before, .fx-invert-colors *::after { animation: none !important; transition: none !important; }
}