Error19: Typographic 404 Index

A monochrome 404 carried entirely by type: a parenthetical eyebrow, a display headline whose emphasis clause drops to muted grey, a pill call to action, and a ruled index listing every section of the site in large bold rows.

Installation

Swap YOUR_EMAIL and YOUR_KEY for the email and license key on your account. Find your license key on your account page.

Radix flavor

npx shadcn add "https://ui.beste.co/r/error19?email=YOUR_EMAIL&license_key=YOUR_KEY"

Base UI flavor

npx shadcn add "https://ui.beste.co/r-base/error19?email=YOUR_EMAIL&license_key=YOUR_KEY"

This installs the block to components/beste/block/error19.tsx, plus the two design-system primitives it renders through: badge7 for the parenthetical eyebrow and button12 for the pill call to action.

Quick start

The installed file exports error19Demo alongside the block: the exact props behind the preview above. Spread it to get a working error page in one line.

import { Error19, error19Demo } from "@/components/beste/block/error19";

export default function NotFound() {
  return <Error19 {...error19Demo} />;
}

Then replace the demo with your own props. The eyebrow is an object, and the emphasis inside the heading comes from a <strong> tag:

import { Error19 } from "@/components/beste/block/error19";

export default function NotFound() {
  return (
    <Error19
      badge={{ label: "404" }}
      heading="The page you asked for <strong>never existed here</strong>."
      description="Whatever you were reaching for either moved, or was never part of the site."
      button={{ label: "Return to the start", href: "/" }}
      labels={{ indexTitle: "Index" }}
      items={[
        { title: "Selected work", description: "Twelve projects, told properly", href: "/work" },
        { title: "Enquiries", description: "Briefs, timelines and availability", href: "/contact" },
      ]}
    />
  );
}

Props

type ActionLink = {
  label: string;
  href: string;
};

type IndexItem = {
  title: string;
  description?: string;
  href: string;
};

Behavior notes

• heading is injected with dangerouslySetInnerHTML, so it accepts inline HTML. Text inside <strong> drops to the muted colour instead of an accent, which is what gives the headline its two-tone reading. Keep the value under your own control, never user input.
• Index rows are separated by top borders rather than boxed cells, and each row's title and description sit on a shared baseline that wraps to two lines on narrow screens.
• Row hover only changes the trailing arrow from muted to full contrast through the named group/error19 group. Nothing moves or scales.
• The index caption reuses the same parenthetical eyebrow component as the top of the page, so both labels read as one system.
• Everything is static markup with no client state, so the page renders on the server and works with JavaScript disabled.