Wave Fill CSS Button

Free31 lines · no JS · WCAG fails 1.7

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Theme

A real <button> carrying .btn-wave-fill — the preview is the stylesheet, not a picture of it.

States

default

hover

focus-visible

active

disabled

not declared

.btn-wave-fill {
  display: inline-block;
  padding: 12px 28px;
  border: 2px solid #0d9488;
  border-radius: 10px;
  background-color: rgba(20, 184, 166, 0.08);
  background-image:
    radial-gradient(circle at 8px 12px, #14b8a6 7px, transparent 8px),
    linear-gradient(180deg, #14b8a6, #0d9488);
  background-repeat: repeat-x, no-repeat;
  background-size: 16px 16px, 100% 0%;
  background-position: 0 calc(100% + 16px), left bottom;
  color: #5eead4;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-size 0.5s ease, background-position 0.5s ease, color 0.35s ease, transform 0.1s ease;
}
.btn-wave-fill:hover {
  background-size: 16px 16px, 100% calc(100% - 5px);
  background-position: 0 -3px, left bottom;
  color: #042f2e;
}
.btn-wave-fill:active {
  transform: translateY(1px);
}
.btn-wave-fill:focus-visible {
  outline: 2px solid #0d9488;
  outline-offset: 3px;
}

Self-contained · MIT · no build step.btn-wave-fill

SolidRoundedLiquidHover Reveal

Implementation notes

About the Wave Fill CSS button

Wave Fill uses a clear, high-contrast treatment for primary product actions. Its rounded corners balance product-friendly softness with a clear boundary. It is built around a two-stop radial gradient anchored on #14b8a6 with a 2px border. The liquid, hover reveal details are included in the copy-paste CSS.

Usage

<button class="btn-wave-fill">Button</button>

Pair it with the CSS tab above — the class is self-contained.

Before shipping: keep the semantic button element, verify contrast on your actual background and add a visible:focus-visible state. If you retain motion, include a prefers-reduced-motion override.

Built with: HTML + plain CSS
Shape: Rounded
Exports: CSS, Tailwind, React
License: MIT · commercial use

Complete the look

Build the interface around this button

We matched its palette, surface, geometry and motion to a complete UI system — like composing an outfit, not browsing unrelated parts.

Style DNA · v1

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Pro preview

Modal78% match