This PR finishes the Tailwind migration by doing some minor fixes:
- Remove `@radix-ui/colors` and inline the color values into the color
definitions. The default Tailwind colors are unset and replaced by our
own color set (both in light and dark variants).
- Remove the `colorA` colors because they were used with alpha values.
They were unused and Tailwind v4 supports alpha values natively.
- Replace the `hit-area` JS config with the original CSS config from
https://bazza.dev/craft/2026/hit-area. The original config was migrated
to JS config to work with Tailwind v3. Now that we're on v4, we can just
use the source format.
- Remove the `motion-safe-transition` plugin since it's now [supported
natively by
Tailwind](https://tailwindcss.com/docs/transition-duration#supporting-reduced-motion)
- Replace `tailwindcss-animate` with `tw-animate-css`. The old plugin
was unmaintained and using JS config. The new one should be a drop-in
replacement.
- Remove all scripts for generating colors, they're not needed anymore,
all values are hardcoded.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added hit-area debugging and sizing utilities for enhanced layout
control.
* **Refactor**
* Restructured color system to use hand-edited CSS variables with
inlined values for improved performance and maintainability.
* Migrated animation utilities to a new framework.
* **Style**
* Enhanced motion-reduced animations with improved transition behavior.
* Adjusted sidebar layout styling for better visual presentation.
* **Chores**
* Updated animation dependencies.
* Removed legacy color generation scripts.
<!-- review_stack_entry_start -->
[](https://app.coderabbit.ai/change-stack/supabase/supabase/pull/45925)
<!-- review_stack_entry_end -->
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This PR migrates the JS config for Tailwind into a CSS config. As such,
all variables have been defined as CSS variables and they're using the
specialized Tailwind syntax for generating utility classes.
Beside the migration, these changes were also added:
- Added `tailwind.config.css` to few packages to make the Tailwind
Intellisense work.
- Migrated away from Radix style color classes to our defined classes,
the values will remain the same.
- Most of the CSS is generated by scripts, they'll be removed in next
PRs.
* Removed redundant `border-light` classes from several components since
it was undefined.
* Removed redundant `text-strong` classes from several components since
it was undefined.
How to test:
- Open all apps, compare the UI (mainly colors) to builds from #45417
and try to find a difference.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Style**
* Harmonized color variable usages and updated UI color references
(affects palettes, charts, gradients, hero illustrations, and
scrollbars).
* Tweaked border, tab, and selection visuals across components.
* **New Features**
* Added a suite of theme animations and refined typography presets used
by site prose and docs.
* **Refactor**
* Overhauled Tailwind/theme configuration and color token generation for
more consistent theming.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Ivan Vasilov
