[PelayoFelgueroso]

Checklist
(Check off all the items before submitting)

• Build process is done without errors. All tests pass in the /lib directory.
• Self-reviewed the code before submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed.
• Added/updated tests as needed.

Purpose
Fix color-contrast errors at Toast component

[Jialecl]

These changes are not correct, as it was not correct either before.
now fg colors are also used in the border, while before border colors were used also for fg.