Custom Dark Mode
Custom Dark Mode applies customized dark styles to webpages through a browser add-on.
About Custom Dark Mode
Custom Dark Mode is a browser extension that applies user-adjusted dark styles to websites. It is controlled from a toolbar popup with an on/off toggle, color sliders and pickers for elements such as body background, font and header, opacity adjustment for HTML elements, and buttons to add or remove the current domain from a whitelist. Settings auto-save in the popup. The extension defaults to off after install, does not display correctly on some websites, has no viewable whitelist table, and needs a separate add-on to darken the new tab page.
Key features
- Toggle dark styles on or off from toolbar popup
- Customize dark colors with sliders and color pickers
- Adjust opacity for all HTML elements
- Add or remove domains from whitelist in popup
- Settings auto-save to memory in toolbar popup
- Reset button restores settings to factory defaults
Best for: People who want to adjust dark colors and exclusions per website in Firefox, Chrome, or Opera.
Good for
- Offers over 14 options to customize dark mode colors
- Available for Firefox, Chrome and Opera on all operating systems
- Changes auto-save in the toolbar popup
Watch out for
- Does not work properly for some websites
- No option to see the whitelist table
- Requires a separate add-on to darken the new tab page
Custom Dark Mode at a glance
- Category
- Software & Utilities › Browser Extensions
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Browser Extensions
Custom Dark Mode alternatives
Tools and sites you could use instead, ranked by how closely they match.
Dark Reader adds adjustable dark mode to websites across Chrome, Firefox, Safari, and Edge.
Doqment combines the Mozilla HTML5 PDF viewer with an add-on for reader mode.
Open source
24 alternatives
Darken websites or dim video backgrounds with Turn Off the Lights, an open-source browser extension.
Tint webpage colors by time of day with Circadian, a browser extension offering daytime, sunset, and bedtime settings.
Open source
24 alternatives
Stylebot lets users change webpage colors, fonts, and other styles with a basic editor or custom CSS.
SmartUpscale applies integer scaling to webpage images in Firefox and Chrome to reduce blur on high-density displays.
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Custom Dark Mode FAQ
How do I turn dark mode on or off?
Open the toolbar popup and click the big torch button at the top center. It shows dark grey combined with yellow when active. The default state is OFF after install.
How do I exclude a website from dark mode?
In the toolbar popup, press the (+) button to add the domain to the whitelist and the (-) button to remove it. The current version has no viewable whitelist table.
Are color changes saved automatically?
Yes, changes made with the sliders and color pickers auto-save to memory. A reset button at the top right restores factory defaults, and that operation is irreversible.
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