Border color: only shows a single palette

[oandregal]

Description

The color panel is able to show three different palettes: the theme, the default, and the user one. This works for text, background, and link colors. However, the border color only shows a single palette.

Step-by-step reproduction instructions

How to test

With theme colors:

• Use the TT1-blocks.
• Add a pullquote and open the border panel: it'll only show the theme palette.

With custom colors:

• Use the TT1-blocks and add a user color via the site editor's global styles sidebar.
• Add a pullquote and open the border panel: it'll only show the custom color added by the user.

With default colors:

• Use the TT1-blocks.
• Remove the user colors added before.
• Remove the theme colors from the theme.json.
• Add a pullquote and open the border panel: it'll only show the default color palette.

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes