Ultraviolet CSS Button

Free24 lines · no JS · WCAG AA 5.7 · dark only

Open in Studio

Theme

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

States

default

hover

focus-visible

active

disabled

not declared

.btn-ultraviolet {
  display: inline-block;
  padding: 12px 28px;
  border: none;
  border-radius: 12px;
  background: #7c3aed;
  color: #ffffff;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.35), 0 0 0 6px rgba(124, 58, 237, 0.15), 0 0 20px rgba(124, 58, 237, 0.6);
  transition: box-shadow 0.25s ease;
}
.btn-ultraviolet:hover {
  box-shadow: 0 0 0 5px rgba(124, 58, 237, 0.4), 0 0 0 10px rgba(124, 58, 237, 0.18), 0 0 32px rgba(124, 58, 237, 0.8);
}
.btn-ultraviolet:active {
  box-shadow: 0 0 0 2px rgba(124, 58, 237, 0.4), 0 0 14px rgba(124, 58, 237, 0.6);
}
.btn-ultraviolet:focus-visible {
  outline: 2px solid #7c3aed;
  outline-offset: 3px;
}

Self-contained · MIT · no build step.btn-ultraviolet

Neon & GlowRounded

Implementation notes

About the Ultraviolet CSS button

Ultraviolet uses luminous contrast designed for dark and futuristic interfaces. Its rounded corners balance product-friendly softness with a clear boundary. Its depth comes from a three-layer shadow. The interaction stays intentionally restrained.

Usage

<button class="btn-ultraviolet">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

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