Modern CSS Filter Effects

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

1Blur Focus

Put it on a row of cards or images: the hovered item stays sharp while its siblings blur and fade. Class: fx-blur-focus

<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
  <div class="fx-blur-focus flex gap-2">
    <img src="../assets/img/square-2.svg" alt="First gallery item" class="rounded-lg object-cover" style="width:82px;height:110px"><img src="../assets/img/square-4.svg" alt="Second gallery item" class="rounded-lg object-cover" style="width:82px;height:110px"><img src="../assets/img/square-6.svg" alt="Third gallery item" class="rounded-lg object-cover" style="width:82px;height:110px">
  </div>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-blur-focus > * { transition: filter .4s ease, opacity .4s ease, transform .4s ease; }
.fx-blur-focus:hover > :not(:hover) { filter: blur(3px) saturate(.6); opacity: .65; }
.fx-blur-focus > :hover { transform: translateY(-4px); }
@media (prefers-reduced-motion: reduce) {
  .fx-blur-focus, .fx-blur-focus::before, .fx-blur-focus::after, .fx-blur-focus *, .fx-blur-focus *::before, .fx-blur-focus *::after { animation: none !important; transition: none !important; }
}

2Invert Colors

Flips an image or card to its negative on hover while hue-rotate keeps the colours recognisable. Class: fx-invert-colors

A guide to telehealth

<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
  <div class="card fx-invert-colors" style="width:12rem">
    <img src="../assets/img/photo-5.svg" alt="Card photo" class="card-img-top object-cover" style="height:110px"> 
    <div class="card-body py-2">
      <p class="small mb-0 font-semibold">A guide to telehealth</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; }
}

3Text Filter Effects

Headings come into focus from a blur with a coloured drop shadow - a cinematic title reveal. Class: fx-text-filter-effects

Modern healthcare close to home

<div class="flex flex-wrap items-center justify-center gap-4 p-4 h-full" style="min-height:200px">
  <h2 class="h2 font-bold text-primary text-center mb-0 fx-text-filter-effects">Modern healthcare close to home</h2>
</div>

/* CSS (already in assets/css/effects.css) */
.fx-text-filter-effects { filter: drop-shadow(0 4px 10px rgba(var(--wt-primary-rgb), .45)); animation: fx-text-filter-effects-focus 5s ease-in-out infinite; }
@keyframes fx-text-filter-effects-focus {
  0% { filter: blur(8px) drop-shadow(0 4px 10px rgba(var(--wt-primary-rgb), 0)); opacity: .2; letter-spacing: .25em; }
  30%, 85% { filter: blur(0) drop-shadow(0 4px 10px rgba(var(--wt-primary-rgb), .45)); opacity: 1; letter-spacing: normal; }
  100% { filter: blur(0) drop-shadow(0 4px 10px rgba(var(--wt-primary-rgb), .45)); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .fx-text-filter-effects, .fx-text-filter-effects::before, .fx-text-filter-effects::after, .fx-text-filter-effects *, .fx-text-filter-effects *::before, .fx-text-filter-effects *::after { animation: none !important; transition: none !important; }
}