Describe the bug
The "Need an Account?" text in the default-authentication-identification stage when the enrollment flow is selected becomes unreadable when the settings.theme.base variable is set to dark, or it's set to automatic (default), and the system theme changes to dark.

To Reproduce
Steps to reproduce the behavior:

1. Ensure the settings.theme.base variable is set to dark, or it's set to automatic and your client system is set to "dark."
2. Update the default-authentication-identification stage with a recovery flow.
3. Execute a flow that includes the default-authentication-identification stage.
4. Observe the "Need an account?" text in the bottom grey box.

Expected behavior
The grey box color should be changed. Either a medium grey would work in both light or dark color schemes, or it should change with the theme to a dark grey in the dark color scheme (with white text,) and remain a light grey in the light color scheme.

Screenshots
Light Color Scheme (text highlighted with a red box.)

Dark Color Scheme (text highlighted with a red box.)

Logs
No relevant logs.

Version and Deployment (please complete the following information):

• authentik version: 2023.5.3
• Deployment: Unraid via Docker (not docker-compose)

Additional context
None that seems relevent.