Penumbra - Colour Mode Manager

How to install Open in Chrome Web Store

CRX ID

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Status

Description from extension meta

Seamlessly switch colour schemes on any website with one-click theme shifting.

Image from store

Description from store

Penumbra — Elegant Dark Mode 🌑

A refined dark mode for every website. Penumbra transforms bright pages into comfortable dark themes with smart auto-switching.

🌙 Instant Dark Mode
One click to go dark on any site. Backgrounds darken, text stays clear.

⏰ Scheduled Switching
Dark at night, light by day — fully automatic or based on system settings.

🎨 Customisable
Adjust brightness, contrast, and warmth. Per-site settings available.

📋 Whitelist
Exclude domains from dark mode.

🖼️ Smart Detection
Images and media preserved in original colours.

👁️ Eye Comfort
Softer light for evening and nighttime browsing.

⚡ Lightweight
No flash, no lag, no fuss.

Install Penumbra for effortless dark browsing.

Extension Actions