Offset Fill Button: CSS Hover Effect

Offset Fill Button

A tinted block sits offset behind the outline; on hover it snaps into the frame with a little overshoot and turns solid. The block is a pseudo-element that only moves and recolors.

Also known as: offset background button, retro offset hover, fill snap button.

Color Base size 16px Dark background Hold hover state

HTML

<button class="hfx-offset-fill">View our work</button>

CSS

.hfx-offset-fill {
  --c: var(--hfx-color, #3b82f6);
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.75em 1.75em;
  border-radius: 0.5em;
  font: 600 var(--hfx-size, 16px)/1.2 system-ui, sans-serif;
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid var(--c);
  background: transparent;
  color: var(--c);
  transition: color 0.2s ease 0.05s;
}
.hfx-offset-fill::before {
  content: "";
  position: absolute;
  inset: -2px;
  z-index: -1;
  border-radius: inherit;
  background: color-mix(in srgb, var(--c) 22%, transparent);
  transform: translate(0.35em, 0.35em);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.25s ease;
}
.hfx-offset-fill:is(:hover, :focus-visible) { color: #fff; }
.hfx-offset-fill:is(:hover, :focus-visible)::before {
  background: var(--c);
  transform: translate(0, 0);
}

@media (prefers-reduced-motion: reduce) {
  .hfx-offset-fill, .hfx-offset-fill *, .hfx-offset-fill::before, .hfx-offset-fill::after, .hfx-offset-fill *::before, .hfx-offset-fill *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

Tailwind CSS version

The same effect using Tailwind utility classes. No custom CSS or config needed.

<button class="group relative isolate rounded-lg border-2 border-blue-500 px-7 py-3 font-semibold text-blue-500 transition-colors duration-200 hover:text-white">
  <span class="absolute -inset-[2px] -z-10 translate-x-1.5 translate-y-1.5 rounded-lg bg-blue-500/20 transition duration-300 ease-[cubic-bezier(0.34,1.56,0.64,1)] group-hover:translate-x-0 group-hover:translate-y-0 group-hover:bg-blue-500"></span>
  View our work
</button>

Customizing this snippet

Color: set --hfx-color on the element or a parent. Currently previewing #3b82f6.
Base size: set --hfx-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 16px.
Speed: change the duration on the transition or animation shorthand. 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.

Offset Fill Button

HTML

CSS

Tailwind CSS version

Customizing this snippet

Similar hover effects