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

Chrome extension by gameitorium35 · Productivity · Developer

  • Established publisher

A Chrome extension in Productivity · Developer with 86 users, barely installed.

Specific sites only: 5 match patterns.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
86
Rating
5.0 (1 ratings)
Users, last 18 days
-1
Rating, last 30 days
Not watched long enough to say
Version
1.9.1
Updated in the store
2026-08-29
Published
2026-05-12
Manifest
V3
Browser access
3 permissions, 5 site patterns

How it has moved

Users
-1 since 31.08
86-102 · 11 readings
2026-09-12: gained the good publisher record badge
  1. 2026-08-3187
  2. 2026-09-0294
  3. 2026-09-0495
  4. 2026-09-0698
  5. 2026-09-0794
  6. 2026-09-08102
  7. 2026-09-09101
  8. 2026-09-1395
  9. 2026-09-1598
  10. 2026-09-1686
  11. 2026-09-1786
Rating
unchanged since 31.08
reviewsrating 5.00 · 11 readings
2026-09-12: gained the good publisher record badge
  1. 2026-08-31reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-04reviews1rating5.00
  4. 2026-09-06reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-08reviews1rating5.00
  7. 2026-09-09reviews1rating5.00
  8. 2026-09-13reviews1rating5.00
  9. 2026-09-15reviews1rating5.00
  10. 2026-09-16reviews1rating5.00
  11. 2026-09-17reviews1rating5.00
Users
-1 since 31.08
86-102 · 11 readings
2026-09-12: gained the good publisher record badge
  1. 2026-08-3187
  2. 2026-09-0294
  3. 2026-09-0495
  4. 2026-09-0698
  5. 2026-09-0794
  6. 2026-09-08102
  7. 2026-09-09101
  8. 2026-09-1395
  9. 2026-09-1598
  10. 2026-09-1686
  11. 2026-09-1786
Rating
unchanged since 31.08
reviewsrating 5.00 · 11 readings
2026-09-12: gained the good publisher record badge
  1. 2026-08-31reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-04reviews1rating5.00
  4. 2026-09-06reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-08reviews1rating5.00
  7. 2026-09-09reviews1rating5.00
  8. 2026-09-13reviews1rating5.00
  9. 2026-09-15reviews1rating5.00
  10. 2026-09-16reviews1rating5.00
  11. 2026-09-17reviews1rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 5 match patterns.

  • https://claude.ai/*
  • https://chatgpt.com/*
  • https://chat.openai.com/*
Show the remaining 2
  • https://vellum-license.gameitorium35.workers.dev/*
  • https://weathered-pond-d21a.gameitorium35.workers.dev/*
  • Act on the current tab, but only after you click it activeTab
  • Schedule work to run later alarms
  • Store data in your browser storage

The full permission history for this extension

What changed recently

  1. Store badges changed

The publisher

gameitorium35 publishes 2 listings we track, 791 users between them.

  1. Ome.TV Dark Mode gameitorium35 · Productivity · Tools · published 2026-07-20 705 users

Like this one

Listings the catalog judges closest in what they say they do.

  1. AI Chat Themes: Custom Themes & Dark Mode for ChatGPT and Claude Describes nearly the same job, smaller audience 62 users ★ 5.0
  2. Custom Themes for ChatGPT - Skins, Dark Mode & UI Styles Describes nearly the same job, smaller audience 1k users ★ 4.2
  3. ChatGPT, Claude & Gemini Themes – Chroma AI Describes nearly the same job, smaller audience 170 users ★ 5.0
  4. Yume Themes for Claude - Skins, Dark Mode & Sakura UI Styles Describes nearly the same job, smaller audience 119 users ★ 5.0
  5. ThemeMyAI: Custom Themes & Colors for ChatGPT, Claude and Gemini Describes nearly the same job, smaller audience 23 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.