Glassmorphism Button
A frosted glass button over two colored orbs. On hover the orbs drift under the pane, so you watch the blur at work, and the glass lifts and brightens. Built on backdrop-filter.
Also known as: glass button css, frosted glass button, backdrop blur button.
HTML
<div class="btn-glassmorphism"> <span class="btn-glassmorphism-orb"></span> <span class="btn-glassmorphism-orb"></span> <button class="btn-glassmorphism-btn">Join the beta</button> </div>
CSS
.btn-glassmorphism {
--c: var(--btn-color, #3b82f6);
font-size: var(--btn-size, 18px);
position: relative;
isolation: isolate;
overflow: hidden;
display: inline-grid;
place-items: center;
width: 17em;
height: 8em;
border-radius: 1.1em;
background: linear-gradient(135deg, color-mix(in srgb, var(--c) 55%, #0f172a), color-mix(in srgb, var(--c) 30%, #1e1b4b));
}
.btn-glassmorphism-orb {
position: absolute;
z-index: -1;
border-radius: 50%;
pointer-events: none;
transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.btn-glassmorphism-orb:nth-child(1) {
left: 2.8em;
top: 0.5em;
width: 5em;
height: 5em;
background: radial-gradient(circle at 35% 35%, color-mix(in srgb, var(--c) 55%, #fff), var(--c));
}
.btn-glassmorphism-orb:nth-child(2) {
right: 2.8em;
bottom: 0.4em;
width: 4em;
height: 4em;
background: radial-gradient(circle at 35% 35%, #fde68a, color-mix(in srgb, var(--c) 30%, #ec4899));
}
.btn-glassmorphism-btn {
padding: 0.85em 1.9em;
border: 1px solid rgba(255, 255, 255, 0.35);
border-radius: 0.8em;
background-color: rgba(255, 255, 255, 0.08);
background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.04));
-webkit-backdrop-filter: blur(0.6em);
backdrop-filter: blur(0.6em);
box-shadow: 0 0.5em 1.5em rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.45);
color: #fff;
text-shadow: 0 0.05em 0.4em rgba(15, 23, 42, 0.5);
font: 600 1em/1.2 system-ui, sans-serif;
cursor: pointer;
transition: transform 0.35s ease, background-color 0.35s ease, border-color 0.35s ease;
}
.btn-glassmorphism:is(:hover, :focus-within) .btn-glassmorphism-btn {
transform: translateY(-0.15em);
border-color: rgba(255, 255, 255, 0.6);
background-color: rgba(255, 255, 255, 0.18);
}
.btn-glassmorphism:is(:hover, :focus-within) .btn-glassmorphism-orb:nth-child(1) {
transform: translate(1.7em, 0.7em) scale(1.08);
}
.btn-glassmorphism:is(:hover, :focus-within) .btn-glassmorphism-orb:nth-child(2) {
transform: translate(-1.9em, -0.8em);
}
@media (prefers-reduced-motion: reduce) {
.btn-glassmorphism, .btn-glassmorphism *, .btn-glassmorphism::before, .btn-glassmorphism::after, .btn-glassmorphism *::before, .btn-glassmorphism *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--btn-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--btn-size. Every other dimension is inem, so the whole thing scales together. Currently previewing18px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.