# Foundation theme?

**URL:** https://meta.discourse.org/t/foundation-theme/370753
**Category:** Support
**Created:** [June 18, 2025, 8:48pm UTC](https://meta.discourse.org/t/foundation-theme/370753 "2025-06-18T20:48:25Z")
**Posts on this page:** 8
**Page:** 1

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### Author: ![patrickemin](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/patrickemin/32/520162_2.png) [@patrickemin](https://meta.discourse.org/u/patrickemin)
#### Post date: [June 18, 2025, 8:48pm UTC](https://meta.discourse.org/t/foundation-theme/370753/1 "2025-06-18T20:48:25Z")

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Hi, a new theme appeared in my site, it’s called “Foundation”, I never installed it, do you know something about that ? Thanks !

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### Author: ![HAWK](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/hawk/32/86627_2.png) [@HAWK](https://meta.discourse.org/u/HAWK)
#### Post date: [June 19, 2025, 3:01am UTC](https://meta.discourse.org/t/foundation-theme/370753/2 "2025-06-19T03:01:20Z")

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I believe Foundation is the new name for the Default theme and will have replaced it if you hadn’t modified Default. @jordan.vidrine can correct me if I’m wrong.

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### Author: ![patrickemin](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/patrickemin/32/520162_2.png) [@patrickemin](https://meta.discourse.org/u/patrickemin)
#### Post date: [June 19, 2025, 12:29pm UTC](https://meta.discourse.org/t/foundation-theme/370753/3 "2025-06-19T12:29:51Z")

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Ah yes thanks for the explanation !

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### Author: ![RGJ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/rgj/32/523185_2.png) [@RGJ](https://meta.discourse.org/u/RGJ)
#### Post date: [June 19, 2025, 2:36pm UTC](https://meta.discourse.org/t/foundation-theme/370753/4 "2025-06-19T14:36:37Z")

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This is what I see in a site that was deployed this morning:

 ![image](https://global.discourse-cdn.com/meta/original/4X/8/b/6/8b6aa92045bbf97fed02d7e97fa71cd697932d31.png)

However, there is only “Default” in my themes:

 ![image](https://global.discourse-cdn.com/meta/original/4X/7/d/2/7d2b9f05216380c1e732ce84974250b38276b667.png)

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### Author: ![sam](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/sam/32/102149_2.png) [@sam](https://meta.discourse.org/u/sam)
#### Post date: [June 19, 2025, 11:27pm UTC](https://meta.discourse.org/t/foundation-theme/370753/5 "2025-06-19T23:27:06Z")

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This change is in flux over the next few days new installs will see “Foundation” and “Horizon” in themes which are “core themes”.

Foundation is the same default theme you have today.

These are themes that will **always** be there in the UI, are shipped with Discourse and can not be edited outside of adding components etc.. (no html/css overrides)

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### Author: ![kris.kotlarek](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/kris.kotlarek/32/176919_2.png) [@kris.kotlarek](https://meta.discourse.org/u/kris.kotlarek)
#### Post date: [June 20, 2025, 6:04am UTC](https://meta.discourse.org/t/foundation-theme/370753/6 "2025-06-20T06:04:34Z")

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I made a quick fix so that system themes like “Foundation” and “Horizon” and their associated color palettes are not presented in the UI.  
At least at this stage, when they should still be hidden 🙂

[https://github.com/discourse/discourse/pull/33267](https://github.com/discourse/discourse/pull/33267)

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### Author: ![agent\_kith](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/agent_kith/32/541510_2.png) [@agent\_kith](https://meta.discourse.org/u/agent_kith)
#### Post date: [June 27, 2025, 8:35am UTC](https://meta.discourse.org/t/foundation-theme/370753/7 "2025-06-27T08:35:28Z")

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What happens if I rename the Default theme to Foundation?

I have disabled the Default theme as an experiment, and thus cannot pick Default from the theme switcher now.

However Foundation is still available as a choice. Currently on `3.5.0.beta8-dev(fcb943fa70)`.

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### Author: ![system](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/system/32/443519_2.png) [@system](https://meta.discourse.org/u/system)
#### Post date: [July 27, 2025, 8:36am UTC](https://meta.discourse.org/t/foundation-theme/370753/8 "2025-07-27T08:36:27Z")

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