Schemer

A calm dark mode, per site. One click, fast, and photos stay real. Leaves sites that are already dark alone.

Published, unlisted · Chrome extension · Last updated 30 October 2026

About

Schemer makes websites dark, calm and without fuss. One click on the icon and the site is dark; Schemer remembers it per site. The interface is in Dutch.

What you can do

Fast: one filter over the page, no heavy recalculation. Gmail and large sites stay smooth.
Photos, videos and background images stay real, not negatives.
Recognises sites that are already dark and leaves them alone.
Dimmer and contrast to taste, and Mono for everything in grays.
Only when your system is dark: light by day, dark in the evening.
On everywhere if you like, with exceptions per site. Shortcut: Alt+Shift+D.

Private by design

Schemer only asks for access to a site when you turn it on there.
No server, no account, no tracking. Your settings stay on your own computer.
It does not read or send page content; it only looks at a page’s background colour to see whether it is already dark.

Permissions, and why

activeTab: Recognise the current site after your click or shortcut.
scripting: Apply the dark style on the sites you turned on.
storage: Keep your settings and your list of sites on this device.
offscreen: See whether Chrome is light or dark, so the toolbar icon fits.
Optional: website access: Asked per site when you turn Schemer on there. With “on everywhere” Schemer asks once for all sites.