---
title: "250 Animated Themes & Dark Modes for ChatGPT and Claude: Vellum – Chrome extension stats, history and permissions"
description: "156 users, rated 5.00 by 1 person. Version 1.9.2, updated 2026-09-24. Requests 8 permissions."
url: "https://extensiontracker.com/extension/pnpplaegcahgbndhahihciknencicpjn"
---

# 250 Animated Themes & Dark Modes for ChatGPT and Claude: Vellum

Live in the Chrome Web Store.

- Users: 156
- Rating: 5.00 from 1 rating
- Last checked: 2026-09-27 07:45 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #55,373 of 264,703 live extensions
- Rank in Developer Tools: #4,884 of 27,615

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> Transform ChatGPT and Claude with 250 hand-built animated backgrounds, from pure black to neon cities. Free trial, no tracking.

- Extension ID: `pnpplaegcahgbndhahihciknencicpjn`
- Developer: [gameitorium35](https://extensiontracker.com/developer/u8e7d545210c6c68fa2c6e89929ce746f)
- Category: [Productivity › Developer Tools](https://extensiontracker.com/category/productivity/developer)
- First published: 2026-05-12
- Last updated: 2026-09-24
- Version: `1.9.2`
- Size: 366 KiB
- Minimum Chrome: 88
- Languages (1): English (United Kingdom)
- Privacy policy: `https://vellum-six-kohl.vercel.app/privacy.html`
- Chrome Web Store: <https://chromewebstore.google.com/detail/250-animated-themes-dark/pnpplaegcahgbndhahihciknencicpjn>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fpnpplaegcahgbndhahihciknencicpjn>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 156 | 5.00 | 1 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

### Sites

- `https://chat.openai.com/*`: chat.openai.com
- `https://chatgpt.com/*`: chatgpt.com
- `https://claude.ai/*`: claude.ai
- `https://vellum-license.gameitorium35.workers.dev/*`: vellum-license.gameitorium35.workers.dev
- `https://weathered-pond-d21a.gameitorium35.workers.dev/*`: weathered-pond-d21a.gameitorium35.workers.dev

### Sites where it runs scripts

- `https://chat.openai.com/*`: chat.openai.com
- `https://chatgpt.com/*`: chatgpt.com
- `https://claude.ai/*`: claude.ai

### Browser features

- `activeTab`: The tab you're on, only after you click the extension
- `alarms`: Run tasks on a schedule
- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [Ome.TV Dark Mode](https://extensiontracker.com/extension/ljldkbombocaiooifdaepjeilhbdemjb) | 797 | – | – | Tools |

All 2 extensions by [gameitorium35](https://extensiontracker.com/developer/u8e7d545210c6c68fa2c6e89929ce746f).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 2026-09-27 07:45 UTC; next check around 2026-10-18.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “250 Animated Themes & Dark Modes for ChatGPT and Claude: Vellum” (pnpplaegcahgbndhahihciknencicpjn). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/pnpplaegcahgbndhahihciknencicpjn. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_pnpplaegcahgbndhahihciknencicpjn,
  title   = {250 Animated Themes & Dark Modes for ChatGPT and Claude: Vellum (pnpplaegcahgbndhahihciknencicpjn)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/pnpplaegcahgbndhahihciknencicpjn},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/pnpplaegcahgbndhahihciknencicpjn>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.