36 CSS Button Hover Effects13 / 36

Pure CSSMIT licensed

Liquid Fill & Organic Morphing Button Effects

A tactile CTA where a wobbling organic 'liquid' blob swells from the centre to flood the button while its edges settle from a rippling blob into a clean fill — a centre-out liquid morph (distinct from the bottom-up wave of topic 15).

Published Updated

Live Demo
Try it

The code

<div class="bhe-13-group">
<section class="bhe-13a" aria-label="Liquid fill morph button">
  <button class="bhe-13a__btn" type="button"><span class="bhe-13a__blob" aria-hidden="true"></span><span class="bhe-13a__label">Try for free</span></button>
</section>
<section class="bhe-13b" aria-label="Gooey drip button">
  <button class="bhe-13b__btn" type="button"><span class="bhe-13b__drip" aria-hidden="true"></span><span class="bhe-13b__label">Splash in</span></button>
</section>
</div>
.bhe-13-group {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-wrap: wrap;
}

.bhe-13-group > section {
  flex: 1 1 340px;
  min-width: 300px;
}

.bhe-13a,
.bhe-13a *,
.bhe-13a *::before,
.bhe-13a *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.bhe-13a {
  --liquid: oklch(0.6 0.19 195);
  font-family: 'Segoe UI',system-ui,sans-serif;
  width: 100%;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 56px 24px;
  background: #0e1a1f;
}

.bhe-13a__btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  font-size: 16px;
  font-weight: 800;
  color: var(--liquid);
  padding: 18px 44px;
  border: 2px solid var(--liquid);
  border-radius: 9999px;
  cursor: pointer;
  background: transparent;
  transition: color .35s .1s;
}

.bhe-13a__label {
  position: relative;
  z-index: 1;
}

.bhe-13a__blob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 120%;
  aspect-ratio: 1;
  background: var(--liquid);
  transform: translate(-50%,-50%) scale(0);
  border-radius: 42% 58% 63% 37% / 45% 38% 62% 55%;
  animation: bhe-13a-wobble 6s ease-in-out infinite;
  transition: transform .55s cubic-bezier(.2,.9,.2,1),border-radius .5s;
  z-index: 0;
}

.bhe-13a__btn:hover .bhe-13a__blob,
.bhe-13a__btn:focus-visible .bhe-13a__blob {
  transform: translate(-50%,-50%) scale(1.15);
  border-radius: 9999px;
  animation-play-state: paused;
}

.bhe-13a__btn:hover,
.bhe-13a__btn:focus-visible {
  color: #04191d;
}

.bhe-13a__btn:focus-visible {
  outline: 3px solid var(--liquid);
  outline-offset: 3px;
}

@keyframes bhe-13a-wobble {
  0%,
    100% {
    border-radius: 42% 58% 63% 37% / 45% 38% 62% 55%;
  }

  50% {
    border-radius: 60% 40% 38% 62% / 55% 62% 38% 45%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bhe-13a__blob {
    animation: none;
    transition: transform .2s;
  }
}

.bhe-13b,
.bhe-13b *,
.bhe-13b *::before,
.bhe-13b *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.bhe-13b {
  --liquid: oklch(0.66 0.19 330);
  font-family: 'Segoe UI',system-ui,sans-serif;
  width: 100%;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 56px 24px;
  background: #1a0c18;
}

.bhe-13b__btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  padding: 18px 46px;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  background: color-mix(in oklab,var(--liquid) 30%,#1a0c18);
  transition: background .3s;
}

.bhe-13b__label {
  position: relative;
  z-index: 1;
}

.bhe-13b__drip {
  position: absolute;
  left: 0;
  top: -100%;
  width: 100%;
  height: 100%;
  background: var(--liquid);
  border-radius: 0 0 46% 54%/0 0 40% 40%;
  transition: transform .5s cubic-bezier(.5,0,.2,1);
  z-index: 0;
}

.bhe-13b__btn:hover .bhe-13b__drip,
.bhe-13b__btn:focus-visible .bhe-13b__drip {
  transform: translateY(100%);
}

.bhe-13b__btn:focus-visible {
  outline: 3px solid var(--liquid);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .bhe-13b__drip {
    transition: transform .25s;
  }
}
/* No JavaScript — pure CSS; all designs for this title are driven entirely by the css field. */
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
Here's a working CSS Button Hover Effect from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: Liquid Fill & Organic Morphing Button Effects
Source: https://codefronts.com/motion/css-button-hover-effects/liquid-fill-organic-morphing-button-effects/

A tactile CTA where a wobbling organic 'liquid' blob swells from the centre to flood the button while its edges settle from a rippling blob into a clean fill — a centre-out liquid morph (distinct from the bottom-up wave of topic 15).
## HTML
```html
<div class="bhe-13-group">
<section class="bhe-13a" aria-label="Liquid fill morph button">
  <button class="bhe-13a__btn" type="button"><span class="bhe-13a__blob" aria-hidden="true"></span><span class="bhe-13a__label">Try for free</span></button>
</section>
<section class="bhe-13b" aria-label="Gooey drip button">
  <button class="bhe-13b__btn" type="button"><span class="bhe-13b__drip" aria-hidden="true"></span><span class="bhe-13b__label">Splash in</span></button>
</section>
</div>
```
## CSS
```css
.bhe-13-group {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-wrap: wrap;
}

.bhe-13-group > section {
  flex: 1 1 340px;
  min-width: 300px;
}

.bhe-13a,
.bhe-13a *,
.bhe-13a *::before,
.bhe-13a *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.bhe-13a {
  --liquid: oklch(0.6 0.19 195);
  font-family: 'Segoe UI',system-ui,sans-serif;
  width: 100%;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 56px 24px;
  background: #0e1a1f;
}

.bhe-13a__btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  font-size: 16px;
  font-weight: 800;
  color: var(--liquid);
  padding: 18px 44px;
  border: 2px solid var(--liquid);
  border-radius: 9999px;
  cursor: pointer;
  background: transparent;
  transition: color .35s .1s;
}

.bhe-13a__label {
  position: relative;
  z-index: 1;
}

.bhe-13a__blob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 120%;
  aspect-ratio: 1;
  background: var(--liquid);
  transform: translate(-50%,-50%) scale(0);
  border-radius: 42% 58% 63% 37% / 45% 38% 62% 55%;
  animation: bhe-13a-wobble 6s ease-in-out infinite;
  transition: transform .55s cubic-bezier(.2,.9,.2,1),border-radius .5s;
  z-index: 0;
}

.bhe-13a__btn:hover .bhe-13a__blob,
.bhe-13a__btn:focus-visible .bhe-13a__blob {
  transform: translate(-50%,-50%) scale(1.15);
  border-radius: 9999px;
  animation-play-state: paused;
}

.bhe-13a__btn:hover,
.bhe-13a__btn:focus-visible {
  color: #04191d;
}

.bhe-13a__btn:focus-visible {
  outline: 3px solid var(--liquid);
  outline-offset: 3px;
}

@keyframes bhe-13a-wobble {
  0%,
    100% {
    border-radius: 42% 58% 63% 37% / 45% 38% 62% 55%;
  }

  50% {
    border-radius: 60% 40% 38% 62% / 55% 62% 38% 45%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bhe-13a__blob {
    animation: none;
    transition: transform .2s;
  }
}

.bhe-13b,
.bhe-13b *,
.bhe-13b *::before,
.bhe-13b *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.bhe-13b {
  --liquid: oklch(0.66 0.19 330);
  font-family: 'Segoe UI',system-ui,sans-serif;
  width: 100%;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 56px 24px;
  background: #1a0c18;
}

.bhe-13b__btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  padding: 18px 46px;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  background: color-mix(in oklab,var(--liquid) 30%,#1a0c18);
  transition: background .3s;
}

.bhe-13b__label {
  position: relative;
  z-index: 1;
}

.bhe-13b__drip {
  position: absolute;
  left: 0;
  top: -100%;
  width: 100%;
  height: 100%;
  background: var(--liquid);
  border-radius: 0 0 46% 54%/0 0 40% 40%;
  transition: transform .5s cubic-bezier(.5,0,.2,1);
  z-index: 0;
}

.bhe-13b__btn:hover .bhe-13b__drip,
.bhe-13b__btn:focus-visible .bhe-13b__drip {
  transform: translateY(100%);
}

.bhe-13b__btn:focus-visible {
  outline: 3px solid var(--liquid);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .bhe-13b__drip {
    transition: transform .25s;
  }
}
```

## JavaScript
```js
/* No JavaScript — pure CSS; all designs for this title are driven entirely by the css field. */
```

How this works

A ::before blob with an animated multi-value border-radius wobbles at rest, scaled small in the centre; on hover it scales past the bounds while its radius eases to the pill shape, flooding the button as the label inverts.

Make it yours

  • Edit the blob radius stops.
  • Recolour via --liquid.
  • Adjust flood extent via the hover scale.
  • Slow the idle wobble.

Gotchas — read before shipping

  • overflow:hidden clips the swelling blob.
  • Keep the resting scale small.
  • Invert the label colour on hover.

Browser support

ChromeSafariFirefoxEdge
111+16.2+113+111+

Floor set by oklch(), color-mix() as this demo is written. The core technique itself goes back further — Chrome 55+.

Multi-value border-radius + transform animate everywhere; no fallback.

Techniques used in this demo

aspect-ratioMDN ↗color-mix()MDN ↗@keyframesMDN ↗place-items / place-contentMDN ↗oklch()MDN ↗

Search CodeFronts

Loading…

↑↓ navigate↵ selectesc closeOpen full search page →