One palette language for many hostnames
“Custom website theme” here means your chosen colours for CSS UI: page chrome, surfaces, text, links, controls, and accents. ForcedSkin applies that palette on Chromium tabs so frequently visited sites share a visual language even when each origin ships a different brand skin.
It is still the original site: same layout, same articles, same ads, same links. You are not installing a userstyle that rearranges columns. If you only needed a product slogan, About would suffice; this page is about choosing and authoring palettes.
Marketplace palettes, not one-off hex hacks
Browse ready-made light and dark schemes in the theme marketplace. Favourites and the active light/dark pair can sync after you sign in. Authors follow the field layout in the theme authoring guide rather than pasting random CSS onto every domain.
Because the engine maps interface roles onto palette tokens, a custom theme stays coherent when a site uses CSS variables, gradients, or form controls. Photos and video frames are left as media, which is the point of avoiding invert-based “custom themes.”
- Light and dark palettes can be selected independently
- JSON theme fields are documented in the authoring guide
- Optional account sync on forcedskin.com
When a custom theme needs a site adapter
Some products bury UI colour in components the generic mapper only partly reaches. Community JSON formulae (forcedskin-adapter-formula/v1) on adapters tighten those hostnames without forking a whole new extension.
A custom theme plus an adapter is still recolouring. If the site’s own design is already what you want, skip both and exclude that hostname. Switching how you apply a theme is covered in change website theme.
What a custom theme cannot cover
chrome:// pages, the Chrome Web Store, closed Shadow DOM, and bitmap-only interfaces will not adopt your palette. ForcedSkin does not restyle the browser toolbar. Treat those as out of scope rather than broken marketplace items.
Start from a marketplace theme, customise it with the theme guide, and keep how it works in mind so expectations match CSS reality.
Common questions
Can I use different custom themes for light and dark?
Yes. ForcedSkin stores a light palette and a dark palette. Modes pick which one is active, including Auto by local time.
Do custom themes change fonts or spacing?
No. The product recolours CSS UI. It does not restyle layout, type ramps, or content blocks as a full userstyle engine would.
Where do I submit a theme I designed?
Follow the theme authoring guide and the marketplace flow on themes.
Is this the same as a Chrome Web Store “theme”?
No. Store “themes” skin Chrome’s own UI. ForcedSkin skins website CSS. See browser theme extension.