Rainbow Toggle Switch
Off, a grey cloud rains on a stormy track. On, it drifts over and turns white, the sky clears and a rainbow sweeps across behind it. The sweep is a conic mask on an animated @property angle.
Also known as: rain to rainbow toggle, weather toggle css, rainbow switch animation.
HTML
<label class="tgl-rainbow-toggle">
<input type="checkbox" role="switch" aria-label="Sunshine">
<span class="tgl-rainbow-toggle-sky" aria-hidden="true">
<span class="tgl-rainbow-toggle-arc"></span>
<span class="tgl-rainbow-toggle-puff"></span>
<span class="tgl-rainbow-toggle-cloud">
<span class="tgl-rainbow-toggle-rain"></span>
</span>
</span>
</label>CSS
@property --tgl-rainbow-toggle-sweep {
syntax: "<angle>";
inherits: false;
initial-value: 0deg;
}
.tgl-rainbow-toggle {
--c: var(--tgl-color, #3b82f6);
font-size: var(--tgl-size, 24px);
position: relative;
display: inline-flex;
align-items: center;
cursor: pointer;
-webkit-tap-highlight-color: transparent;
}
.tgl-rainbow-toggle input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.tgl-rainbow-toggle-sky {
position: relative;
display: block;
width: 6.4em;
height: 2.8em;
border-radius: 1.4em;
overflow: hidden;
isolation: isolate;
background: #64748b;
box-shadow: inset 0 0.1em 0.25em rgba(0, 0, 0, 0.25);
transition: background-color 0.6s ease;
}
/* six bands in one radial gradient, revealed by a conic mask that sweeps left to right */
.tgl-rainbow-toggle-arc {
--tgl-rainbow-toggle-sweep: 0deg;
position: absolute;
left: calc(50% - 2.5em);
bottom: -0.4em;
width: 5em;
height: 2.5em;
background: radial-gradient(circle at 50% 100%,
transparent 1.3em,
#ef4444 1.3em 1.5em,
#f59e0b 1.5em 1.7em,
#facc15 1.7em 1.9em,
#22c55e 1.9em 2.1em,
#3b82f6 2.1em 2.3em,
#8b5cf6 2.3em 2.5em,
transparent 2.5em);
-webkit-mask: conic-gradient(from 270deg at 50% 100%, #000 var(--tgl-rainbow-toggle-sweep), transparent 0);
mask: conic-gradient(from 270deg at 50% 100%, #000 var(--tgl-rainbow-toggle-sweep), transparent 0);
transition: --tgl-rainbow-toggle-sweep 0.5s ease-in;
}
/* clouds are pills with a puff on top, filled with currentColor so one color transition recolors them */
.tgl-rainbow-toggle-cloud,
.tgl-rainbow-toggle-puff {
position: absolute;
color: #cbd5e1;
}
.tgl-rainbow-toggle-cloud::before,
.tgl-rainbow-toggle-cloud::after,
.tgl-rainbow-toggle-puff::before,
.tgl-rainbow-toggle-puff::after {
content: "";
position: absolute;
background: currentColor;
}
.tgl-rainbow-toggle-cloud {
top: 0.75em;
left: 0.3em;
z-index: 1;
width: 2.3em;
height: 1.6em;
transition: transform 0.8s cubic-bezier(0.5, 0, 0.25, 1), color 0.6s ease;
}
.tgl-rainbow-toggle-cloud::before {
left: 0;
bottom: 0.3em;
width: 2.3em;
height: 0.8em;
border-radius: 0.4em;
}
.tgl-rainbow-toggle-cloud::after {
left: 0.45em;
bottom: 0.6em;
width: 1.05em;
height: 1.05em;
border-radius: 50%;
box-shadow: 0.72em 0.22em 0 -0.18em currentColor;
}
.tgl-rainbow-toggle-puff {
top: 1.65em;
left: 0.35em;
width: 1.5em;
height: 1em;
color: #fff;
opacity: 0;
transform: translateX(-1em);
transition: opacity 0.4s ease, transform 0.6s ease;
}
.tgl-rainbow-toggle-puff::before {
left: 0;
bottom: 0;
width: 1.5em;
height: 0.6em;
border-radius: 0.3em;
}
.tgl-rainbow-toggle-puff::after {
left: 0.35em;
bottom: 0.3em;
width: 0.7em;
height: 0.7em;
border-radius: 50%;
}
.tgl-rainbow-toggle-rain {
position: absolute;
left: 0.55em;
top: 1.3em;
width: 1.3em;
height: 1em;
transition: opacity 0.2s ease;
}
.tgl-rainbow-toggle-rain::before,
.tgl-rainbow-toggle-rain::after {
content: "";
position: absolute;
top: 0;
left: 0;
width: 0.08em;
height: 0.28em;
border-radius: 0.04em;
background: #93c5fd;
box-shadow: 0.55em 0.1em 0 #93c5fd, 1.1em -0.05em 0 #93c5fd;
animation: tgl-rainbow-toggle-fall 0.7s linear infinite;
}
.tgl-rainbow-toggle-rain::after {
left: 0.28em;
animation-delay: -0.35s;
}
.tgl-rainbow-toggle input:checked + .tgl-rainbow-toggle-sky { background: color-mix(in srgb, var(--c) 40%, #e0f2fe); }
.tgl-rainbow-toggle input:checked + .tgl-rainbow-toggle-sky .tgl-rainbow-toggle-arc {
--tgl-rainbow-toggle-sweep: 180deg;
transition: --tgl-rainbow-toggle-sweep 0.9s cubic-bezier(0.5, 0, 0.3, 1) 0.1s;
}
.tgl-rainbow-toggle input:checked + .tgl-rainbow-toggle-sky .tgl-rainbow-toggle-cloud {
transform: translateX(3.5em);
color: #fff;
}
.tgl-rainbow-toggle input:checked + .tgl-rainbow-toggle-sky .tgl-rainbow-toggle-rain { opacity: 0; }
.tgl-rainbow-toggle input:checked + .tgl-rainbow-toggle-sky .tgl-rainbow-toggle-puff {
opacity: 1;
transform: none;
transition-delay: 0.2s;
}
@keyframes tgl-rainbow-toggle-fall {
0% { transform: translateY(0); opacity: 0; }
20% { opacity: 1; }
100% { transform: translateY(0.7em); opacity: 0; }
}
.tgl-rainbow-toggle input:focus-visible + .tgl-rainbow-toggle-sky {
outline: 2px solid var(--c);
outline-offset: 0.2em;
}
@media (prefers-reduced-motion: reduce) {
.tgl-rainbow-toggle, .tgl-rainbow-toggle *, .tgl-rainbow-toggle::before, .tgl-rainbow-toggle::after, .tgl-rainbow-toggle *::before, .tgl-rainbow-toggle *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--tgl-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--tgl-size. Every other dimension is inem, so the whole thing scales together. Currently previewing24px. - 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.