Gradient Shift Button
A two-tone gradient slides across the button on hover by moving the background position. The second color is mixed from your accent, so it always matches.
Also known as: animated gradient button, gradient hover.
HTML
<button class="hfx-gradient-shift">Start free trial</button>
CSS
.hfx-gradient-shift {
--c: var(--hfx-color, #3b82f6);
font-size: var(--hfx-size, 16px);
display: inline-flex;
align-items: center;
gap: 0.5em;
padding: 0.7em 1.6em;
border-radius: 0.5em;
font: 600 1em system-ui, sans-serif;
cursor: pointer;
border: 0;
color: #fff;
background: linear-gradient(120deg, var(--c), color-mix(in srgb, var(--c) 55%, #ec4899), var(--c));
background-size: 200% 100%;
background-position: 0% 50%;
transition: background-position 0.5s ease;}
.hfx-gradient-shift:hover { background-position: 100% 50%; }
@media (prefers-reduced-motion: reduce) {
.hfx-gradient-shift, .hfx-gradient-shift *, .hfx-gradient-shift::before, .hfx-gradient-shift::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--hfx-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--hfx-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - 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.