51 Tailwind CSS Buttons
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All 51 in 51 Tailwind CSS Buttons

  1. 01Tailwind Submit Button (Form Primary)
  2. 02Tailwind Primary and Secondary Button Pair
  3. 03Tailwind Ghost / Outline Button
  4. 04Tailwind Icon-Only Button with Accessible Tooltip
  5. 05Tailwind Gradient CTA Button
  6. 06Tailwind Loading Spinner Button (State Transition)
  7. 07Tailwind Disabled Button State (Full State Reference)
  8. 08Tailwind Button Group Component (Segmented Radio-Like)
  9. 09Tailwind Add to Cart Button
  10. 10Tailwind Download Progress Button
  11. 11Tailwind Like Heart Button
  12. 12Tailwind Confirm Delete Button
  13. 13Tailwind Play Pause Button
  14. 14Tailwind Subscribe Confetti Button
  15. 15Tailwind Magnetic Mercury Ripple Button
  16. 16Tailwind Brutalist Glitch Button
  17. 17Tailwind Neon Plasma Burst Button
  18. 18Tailwind Clay Press Button
  19. 19Tailwind Editorial Ink Spread Button
  20. 20Tailwind Particle Shard Burst Button
  21. 21Tailwind Brushed Brass Plate Button
  22. 22Tailwind Washi Paper Crane Button
  23. 23Tailwind Frosted Ice Cube Button
  24. 24Tailwind Vintage Typewriter Key Button
  25. 25Tailwind Lacquered Walnut Wood Button
  26. 26Tailwind Pharma Gel Capsule Button
  27. 27Tailwind Aged Copper Coin Button
  28. 28Tailwind Origami Fortune Cookie Button
  29. 29Tailwind Holographic Foil Sticker Button
  30. 30Tailwind Brutalist Concrete Slab Button
  31. 31Tailwind Mercury Bead Morph Button
  32. 32Tailwind Soft Pill Modern SaaS Button
  33. 33Tailwind Masking Tape Label Button
  34. 34Tailwind Obsidian Glass Shard Button
  35. 35Tailwind Wine Velvet Ribbon Button
  36. 36Tailwind LED Segment Display Button
  37. 37Tailwind Cassette Mixtape Label Button
  38. 38Tailwind Chalkboard Menu Button
  39. 39Tailwind Vinyl Record Sleeve Ripple Button
  40. 40Tailwind Polaroid Snapshot Button
  41. 41Tailwind Airline Boarding Pass Button
  42. 42Tailwind Aged Brass Subway Token Button
  43. 43Tailwind Vintage Rx Pharmacy Label Button
  44. 44Tailwind Bakelite Radio Dial Toggle Button
  45. 45Tailwind Regal Postage Stamp Button
  46. 46Tailwind Victorian Cigar Band Foil Button
  47. 47Tailwind Vintage Calculator Key Button
  48. 48Tailwind Toolbox Latch Spotlight Button
  49. 49Tailwind Receipt Paper Total Count-Up Button
  50. 50Tailwind IBM Punch Card Magnetic Follow Button
  51. 51Tailwind Brass Periscope Lens Button
Pure TailwindMIT licensed

Tailwind Aged Brass Subway Token Button

A 1953 transit token: milled rim, tarnished brass, and a knocked-out letter you can see the background through — a mask-composite cut, not a coloured glyph. Press it and the token drops into the slot and springs back.

Live Demo
Plain CSSTailwind v4
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The code

<div class="tb-42 w-full min-h-svh grid place-items-center font-tb42-sans p-[clamp(1.5rem,6vw,4rem)]">
  <button type="button" aria-label="Use one transit token" class="group relative cursor-pointer border-0 bg-transparent p-0 w-30 h-[9.5rem] grid place-items-start justify-center [-webkit-tap-highlight-color:transparent] focus-visible:outline-none disabled:cursor-not-allowed disabled:grayscale-[0.7] disabled:brightness-[0.85]">
    <span aria-hidden="true" class="absolute inset-x-[12%] bottom-1.5 h-2 rounded-full bg-[linear-gradient(180deg,#0a0c0b,#1d221f)] shadow-[inset_0_2px_4px_#000000e6,0_1px_0_#ffffff14]"></span>
    <span aria-hidden="true" class="tb-42__disc relative grid place-items-center size-30 rounded-full isolate text-tb42-brass-lo shadow-[inset_0_2px_3px_#ffffff66,inset_0_-3px_6px_#00000073,0_14px_22px_-10px_#000000cc] transition-[translate,filter] duration-300 ease-tb42-out group-hover:-translate-y-[3px] group-hover:brightness-105 group-active:animate-tb42-drop group-focus-visible:outline-2 group-focus-visible:outline-offset-[5px] group-focus-visible:outline-tb42-brass-hi motion-reduce:transition-none motion-reduce:group-active:animate-none">
      <span class="absolute inset-0 z-20 rounded-full opacity-85 bg-[repeating-conic-gradient(from_0deg,var(--color-tb42-reed-hi)_0deg_1.6deg,var(--color-tb42-reed-lo)_1.6deg_3.2deg)] [mask-image:radial-gradient(farthest-side,transparent_calc(100%-6px),#000_calc(100%-6px))]"></span>
      <span class="tb-42__patina absolute inset-0 z-10 rounded-full opacity-45"></span>
      <span class="tb-42__glyph relative z-30 text-[3.1rem] font-bold leading-none text-tb42-brass-lo [text-shadow:0_1px_0_#ffffff59,0_-1px_0_#00000073]">T</span>
    </span>
  </button>
</div>
@import "tailwindcss";

@theme {
  --color-tb42-bg: #191c1a;
  --color-tb42-bg: oklch(0.21 0.008 150);
  --color-tb42-brass: #a98a4a;
  --color-tb42-brass: oklch(0.64 0.08 88);
  --color-tb42-brass-hi: #dcbe7c;
  --color-tb42-brass-hi: oklch(0.82 0.09 90);
  --color-tb42-brass-lo: #6d5527;
  --color-tb42-brass-lo: oklch(0.44 0.07 85);
  --color-tb42-patina: #4f7a5f;
  --color-tb42-patina: oklch(0.55 0.07 160);
  --color-tb42-reed-hi: #cfae68;
  --color-tb42-reed-hi: oklch(0.76 0.09 88);
  --color-tb42-reed-lo: #7a5f2c;
  --color-tb42-reed-lo: oklch(0.48 0.08 86);
  --font-tb42-sans: "Oswald", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease-tb42-out: cubic-bezier(0.16, 1, 0.3, 1);
  --animate-tb42-drop: tb-42-drop 0.62s cubic-bezier(0.3, 0.05, 0.4, 1);
}

@keyframes tb-42-drop {
  0% {
    translate: 0 0;
  }

  38% {
    translate: 0 1.15rem;
    scale: 1 0.94;
  }

  62% {
    translate: 0 -0.3rem;
    scale: 1 1.02;
  }

  100% {
    translate: 0 0;
    scale: 1 1;
  }
}

.tb-42 {
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  background: radial-gradient(30rem 20rem at 50% 44%, #26302a, transparent 74%), var(--color-tb42-bg);
}

.tb-42__disc {
  background: radial-gradient(circle at 34% 28%, var(--color-tb42-brass-hi), transparent 54%), radial-gradient(circle at 72% 78%, var(--color-tb42-brass-lo), transparent 56%), linear-gradient(152deg, var(--color-tb42-brass), color-mix(in oklab, var(--color-tb42-brass) 80%, black));
}

.tb-42__patina {
  mix-blend-mode: color-burn;
  background: radial-gradient(2rem 1.6rem at 26% 74%, var(--color-tb42-patina), transparent 72%), radial-gradient(1.6rem 2rem at 76% 32%, var(--color-tb42-patina), transparent 74%);
}
/* Safari ≤15.3 rim mask shim. */

.tb-42 [class*="mask-image"] {
  -webkit-mask-image: radial-gradient(farthest-side, transparent calc(100% - 6px), #000 calc(100% - 6px));
}
/* THE KNOCKOUT: the glyph is subtracted from the metal, so the hole shows the page.
   A data-URI SVG text mask keeps the cut crisp at any size. Where mask-composite is
   unavailable the fallback above stands: a normal engraved letter. */

@supports ((mask-composite: exclude) or (-webkit-mask-composite: destination-out)) {
  .tb-42__glyph {
    color: transparent;
    text-shadow: none;
  }

  .tb-42__disc {
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ctext x='60' y='86' font-family='Oswald,sans-serif' font-size='78' font-weight='700' text-anchor='middle' fill='%23000'%3ET%3C/text%3E%3C/svg%3E") 50% 50%/60% 60% no-repeat, linear-gradient(#000, #000);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ctext x='60' y='86' font-family='Oswald,sans-serif' font-size='78' font-weight='700' text-anchor='middle' fill='%23000'%3ET%3C/text%3E%3C/svg%3E") 50% 50%/60% 60% no-repeat, linear-gradient(#000, #000);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
  }
}

@media (prefers-color-scheme: light) {
  .tb-42:not([data-theme="dark"]) {
    --color-tb42-bg: oklch(0.26 0.01 150);
  }
}

.tb-42[data-theme="light"] {
  --color-tb42-bg: oklch(0.26 0.01 150);
}

@media (forced-colors: active) {
  .tb-42__disc {
    background: ButtonFace;
    border: 1px solid ButtonText;
    box-shadow: none;
    mask: none;
    -webkit-mask: none;
  }

  .tb-42__glyph {
    color: ButtonText;
    text-shadow: none;
  }

  .tb-42__disc > span:not(.tb-42__glyph) {
    display: none;
  }
}

Setup — do this once per project

Skip this if your project already runs Tailwind v4.

1Load Tailwind
<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>

Compiles in the browser — perfect for a CodePen or a quick test, not for production.

2Add the stylesheetRequiredthe @theme block is what makes the custom utilities exist
@import "tailwindcss";

@theme {
  --color-tb42-bg: #191c1a;
  --color-tb42-bg: oklch(0.21 0.008 150);
  --color-tb42-brass: #a98a4a;
  --color-tb42-brass: oklch(0.64 0.08 88);
  --color-tb42-brass-hi: #dcbe7c;
  --color-tb42-brass-hi: oklch(0.82 0.09 90);
  --color-tb42-brass-lo: #6d5527;
  --color-tb42-brass-lo: oklch(0.44 0.07 85);
  --color-tb42-patina: #4f7a5f;
  --color-tb42-patina: oklch(0.55 0.07 160);
  --color-tb42-reed-hi: #cfae68;
  --color-tb42-reed-hi: oklch(0.76 0.09 88);
  --color-tb42-reed-lo: #7a5f2c;
  --color-tb42-reed-lo: oklch(0.48 0.08 86);
  --font-tb42-sans: "Oswald", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease-tb42-out: cubic-bezier(0.16, 1, 0.3, 1);
  --animate-tb42-drop: tb-42-drop 0.62s cubic-bezier(0.3, 0.05, 0.4, 1);
}

@keyframes tb-42-drop {
  0% {
    translate: 0 0;
  }

  38% {
    translate: 0 1.15rem;
    scale: 1 0.94;
  }

  62% {
    translate: 0 -0.3rem;
    scale: 1 1.02;
  }

  100% {
    translate: 0 0;
    scale: 1 1;
  }
}

.tb-42 {
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  background: radial-gradient(30rem 20rem at 50% 44%, #26302a, transparent 74%), var(--color-tb42-bg);
}

.tb-42__disc {
  background: radial-gradient(circle at 34% 28%, var(--color-tb42-brass-hi), transparent 54%), radial-gradient(circle at 72% 78%, var(--color-tb42-brass-lo), transparent 56%), linear-gradient(152deg, var(--color-tb42-brass), color-mix(in oklab, var(--color-tb42-brass) 80%, black));
}

.tb-42__patina {
  mix-blend-mode: color-burn;
  background: radial-gradient(2rem 1.6rem at 26% 74%, var(--color-tb42-patina), transparent 72%), radial-gradient(1.6rem 2rem at 76% 32%, var(--color-tb42-patina), transparent 74%);
}
/* Safari ≤15.3 rim mask shim. */

.tb-42 [class*="mask-image"] {
  -webkit-mask-image: radial-gradient(farthest-side, transparent calc(100% - 6px), #000 calc(100% - 6px));
}
/* THE KNOCKOUT: the glyph is subtracted from the metal, so the hole shows the page.
   A data-URI SVG text mask keeps the cut crisp at any size. Where mask-composite is
   unavailable the fallback above stands: a normal engraved letter. */

@supports ((mask-composite: exclude) or (-webkit-mask-composite: destination-out)) {
  .tb-42__glyph {
    color: transparent;
    text-shadow: none;
  }

  .tb-42__disc {
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ctext x='60' y='86' font-family='Oswald,sans-serif' font-size='78' font-weight='700' text-anchor='middle' fill='%23000'%3ET%3C/text%3E%3C/svg%3E") 50% 50%/60% 60% no-repeat, linear-gradient(#000, #000);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ctext x='60' y='86' font-family='Oswald,sans-serif' font-size='78' font-weight='700' text-anchor='middle' fill='%23000'%3ET%3C/text%3E%3C/svg%3E") 50% 50%/60% 60% no-repeat, linear-gradient(#000, #000);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
  }
}

@media (prefers-color-scheme: light) {
  .tb-42:not([data-theme="dark"]) {
    --color-tb42-bg: oklch(0.26 0.01 150);
  }
}

.tb-42[data-theme="light"] {
  --color-tb42-bg: oklch(0.26 0.01 150);
}

@media (forced-colors: active) {
  .tb-42__disc {
    background: ButtonFace;
    border: 1px solid ButtonText;
    box-shadow: none;
    mask: none;
    -webkit-mask: none;
  }

  .tb-42__glyph {
    color: ButtonText;
    text-shadow: none;
  }

  .tb-42__disc > span:not(.tb-42__glyph) {
    display: none;
  }
}
3Fonts used by this demooptional — skip if you have your own type stack
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Oswald:wght@500;600;700&display=swap">

What changed in the port

Which parts became utilities, which stayed CSS, and why.

  • Utilities: the disc, the reeded rim and its mask, the drop animation, the hover lift, the slot, the focus ring routed to the disc. CSS: the struck-metal gradients, the blended patina, and the entire knockout @supports block.
  • The data-URI mask is the collection's clearest example of a value that cannot be a utility: it is a URL-encoded SVG document, and Tailwind's arbitrary-value syntax would need every space, quote and angle bracket escaped twice.
  • The @supports block does two things at once — transparent the glyph and mask the disc — which is why it is a block rather than two variants. Either half alone leaves either an invisible letter or a solid one.
  • A11y fix from the CSS original: the CSS version's focus style was outline:none on the button with a ring on .disc, correct, but the drop only fired on :active with no keyboard equivalent and no reduced-motion guard on the animation itself (only on the transition). The port adds motion-reduce:group-active:animate-none, so a vestibular-sensitive user pressing Space gets no fall.
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 demo 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: Tailwind Aged Brass Subway Token Button
Source: https://codefronts.com/components/tailwind-css-buttons/tailwind-aged-brass-subway-token-button/

A 1953 transit token: milled rim, tarnished brass, and a knocked-out letter you can see the background through — a mask-composite cut, not a coloured glyph. Press it and the token drops into the slot and springs back.
## HTML
```html
<div class="tb-42 w-full min-h-svh grid place-items-center font-tb42-sans p-[clamp(1.5rem,6vw,4rem)]">
  <button type="button" aria-label="Use one transit token" class="group relative cursor-pointer border-0 bg-transparent p-0 w-30 h-[9.5rem] grid place-items-start justify-center [-webkit-tap-highlight-color:transparent] focus-visible:outline-none disabled:cursor-not-allowed disabled:grayscale-[0.7] disabled:brightness-[0.85]">
    <span aria-hidden="true" class="absolute inset-x-[12%] bottom-1.5 h-2 rounded-full bg-[linear-gradient(180deg,#0a0c0b,#1d221f)] shadow-[inset_0_2px_4px_#000000e6,0_1px_0_#ffffff14]"></span>
    <span aria-hidden="true" class="tb-42__disc relative grid place-items-center size-30 rounded-full isolate text-tb42-brass-lo shadow-[inset_0_2px_3px_#ffffff66,inset_0_-3px_6px_#00000073,0_14px_22px_-10px_#000000cc] transition-[translate,filter] duration-300 ease-tb42-out group-hover:-translate-y-[3px] group-hover:brightness-105 group-active:animate-tb42-drop group-focus-visible:outline-2 group-focus-visible:outline-offset-[5px] group-focus-visible:outline-tb42-brass-hi motion-reduce:transition-none motion-reduce:group-active:animate-none">
      <span class="absolute inset-0 z-20 rounded-full opacity-85 bg-[repeating-conic-gradient(from_0deg,var(--color-tb42-reed-hi)_0deg_1.6deg,var(--color-tb42-reed-lo)_1.6deg_3.2deg)] [mask-image:radial-gradient(farthest-side,transparent_calc(100%-6px),#000_calc(100%-6px))]"></span>
      <span class="tb-42__patina absolute inset-0 z-10 rounded-full opacity-45"></span>
      <span class="tb-42__glyph relative z-30 text-[3.1rem] font-bold leading-none text-tb42-brass-lo [text-shadow:0_1px_0_#ffffff59,0_-1px_0_#00000073]">T</span>
    </span>
  </button>
</div>
```
## CSS
```css
@import "tailwindcss";

@theme {
  --color-tb42-bg: #191c1a;
  --color-tb42-bg: oklch(0.21 0.008 150);
  --color-tb42-brass: #a98a4a;
  --color-tb42-brass: oklch(0.64 0.08 88);
  --color-tb42-brass-hi: #dcbe7c;
  --color-tb42-brass-hi: oklch(0.82 0.09 90);
  --color-tb42-brass-lo: #6d5527;
  --color-tb42-brass-lo: oklch(0.44 0.07 85);
  --color-tb42-patina: #4f7a5f;
  --color-tb42-patina: oklch(0.55 0.07 160);
  --color-tb42-reed-hi: #cfae68;
  --color-tb42-reed-hi: oklch(0.76 0.09 88);
  --color-tb42-reed-lo: #7a5f2c;
  --color-tb42-reed-lo: oklch(0.48 0.08 86);
  --font-tb42-sans: "Oswald", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease-tb42-out: cubic-bezier(0.16, 1, 0.3, 1);
  --animate-tb42-drop: tb-42-drop 0.62s cubic-bezier(0.3, 0.05, 0.4, 1);
}

@keyframes tb-42-drop {
  0% {
    translate: 0 0;
  }

  38% {
    translate: 0 1.15rem;
    scale: 1 0.94;
  }

  62% {
    translate: 0 -0.3rem;
    scale: 1 1.02;
  }

  100% {
    translate: 0 0;
    scale: 1 1;
  }
}

.tb-42 {
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  background: radial-gradient(30rem 20rem at 50% 44%, #26302a, transparent 74%), var(--color-tb42-bg);
}

.tb-42__disc {
  background: radial-gradient(circle at 34% 28%, var(--color-tb42-brass-hi), transparent 54%), radial-gradient(circle at 72% 78%, var(--color-tb42-brass-lo), transparent 56%), linear-gradient(152deg, var(--color-tb42-brass), color-mix(in oklab, var(--color-tb42-brass) 80%, black));
}

.tb-42__patina {
  mix-blend-mode: color-burn;
  background: radial-gradient(2rem 1.6rem at 26% 74%, var(--color-tb42-patina), transparent 72%), radial-gradient(1.6rem 2rem at 76% 32%, var(--color-tb42-patina), transparent 74%);
}
/* Safari ≤15.3 rim mask shim. */

.tb-42 [class*="mask-image"] {
  -webkit-mask-image: radial-gradient(farthest-side, transparent calc(100% - 6px), #000 calc(100% - 6px));
}
/* THE KNOCKOUT: the glyph is subtracted from the metal, so the hole shows the page.
   A data-URI SVG text mask keeps the cut crisp at any size. Where mask-composite is
   unavailable the fallback above stands: a normal engraved letter. */

@supports ((mask-composite: exclude) or (-webkit-mask-composite: destination-out)) {
  .tb-42__glyph {
    color: transparent;
    text-shadow: none;
  }

  .tb-42__disc {
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ctext x='60' y='86' font-family='Oswald,sans-serif' font-size='78' font-weight='700' text-anchor='middle' fill='%23000'%3ET%3C/text%3E%3C/svg%3E") 50% 50%/60% 60% no-repeat, linear-gradient(#000, #000);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ctext x='60' y='86' font-family='Oswald,sans-serif' font-size='78' font-weight='700' text-anchor='middle' fill='%23000'%3ET%3C/text%3E%3C/svg%3E") 50% 50%/60% 60% no-repeat, linear-gradient(#000, #000);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
  }
}

@media (prefers-color-scheme: light) {
  .tb-42:not([data-theme="dark"]) {
    --color-tb42-bg: oklch(0.26 0.01 150);
  }
}

.tb-42[data-theme="light"] {
  --color-tb42-bg: oklch(0.26 0.01 150);
}

@media (forced-colors: active) {
  .tb-42__disc {
    background: ButtonFace;
    border: 1px solid ButtonText;
    box-shadow: none;
    mask: none;
    -webkit-mask: none;
  }

  .tb-42__glyph {
    color: ButtonText;
    text-shadow: none;
  }

  .tb-42__disc > span:not(.tb-42__glyph) {
    display: none;
  }
}
```

How this works

The letter is genuinely removed from the metal. A text layer masks the disc, and mask-composite subtracts it, so the hole shows whatever is behind the button:

mask: url("data:image/svg+xml,…%3Ctext…%3ET%3C/text%3E…") 50% 50%/60% 60% no-repeat,
      linear-gradient(#000,#000);
mask-composite: exclude;

An inline SVG data URI keeps the cut crisp at any size and needs no font-loading gymnastics. It also cannot be a utility: the value is a URL-encoded document.

The drop is what sells it. Fall with a 0.94 vertical squash, overshoot 0.3rem up, settle — an ease-in descent and a spring return, rather than a single symmetrical bounce.

The fallback is an engraved glyph. Where mask-composite is unavailable the T is a normal embossed letter, which is why it is real text in the markup rather than a pseudo-element.

Make it yours

  • Change the cut letter by editing the data URI's text content — any single glyph works.
  • Nickel instead of brass: desaturate the three metal tokens.
  • Real tokens are unevenly worn — raise the patina layer's opacity for a rougher one.
  • Drop the fall animation for a simple press in a dense toolbar.
  • Rim reed count is the two conic angles, as on the copper coin.

Gotchas — read before shipping

  • A knocked-out glyph is invisible to assistive tech. The aria-label is the accessible name; the hole is decoration.
  • mask-composite spelling differs per engine (destination-out vs exclude); declare both, base layer last for the prefixed form.
  • Data-URI SVG masks must be URL-encoded (%3C, %22) — raw angle brackets break some parsers.
  • Because the letter is a hole, the token cannot sit on a busy background.
  • Circular buttons need ≥44px hit area. This one is 7.5rem.

Browser support

ChromeSafariFirefoxEdge
120+16.4+128+120+

mask-composite needs Chrome 120 / Safari 15.4 / Firefox 53. The @supports block keeps a solid engraved glyph as the fallback, so the token still reads correctly.

Techniques used in this demo

Utilitiesfirst-class utility or variant

mix-blend-modetw ↗

Arbitraryneeds bracket syntax

mask-compositetw ↗

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