### Apache Airflow version

2.2.0b1 (beta snapshot)

### Operating System

Mac OSX 11.5.2

### Versions of Apache Airflow Providers

_No response_

### Deployment

Docker-Compose

### Deployment details

_No response_

### What happened

In the tree view, the status color for deferred is very difficult to distinguish from up_for_reschedule and is generally not very distinct. I can’t imagine it’s good for people with colorblindness either.

### What you expected to happen

I expect the status colors to form a distinct palette. While there is already some crowding in the greens, I don't want to see it get worse with the new status.

### How to reproduce

Make a deferred task and view in tree view.

### Anything else

I might suggest something in the purple range like [BlueViolet #8A2BE2](https://www.color-hex.com/color/8a2be2)


### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

airflow/settings.py
"""Gets session timeout configs and handles outdated configs gracefully."""
    session_lifetime_minutes = conf.get('webserver', 'session_lifetime_minutes', fallback=None)
    session_lifetime_days = conf.get('webserver', 'session_lifetime_days', fallback=None)
    uses_deprecated_lifetime_configs = session_lifetime_days or conf.get(
        'webserver', 'force_log_out_after', fallback=None
    )
    minutes_per_day = 24 * 60
    default_lifetime_minutes = '43200'
    if uses_deprecated_lifetime_configs and session_lifetime_minutes == default_lifetime_minutes:
        warnings.warn(
            '`session_lifetime_days` option from `[webserver]` section has been '
            'renamed to `session_lifetime_minutes`. The new option allows to configure '
            'session lifetime in minutes. The `force_log_out_after` option has been removed '
            'from `[webserver]` section. Please update your configuration.',
            category=DeprecationWarning,
        )
        if session_lifetime_days:
            session_lifetime_minutes = minutes_per_day * int(session_lifetime_days)
    if not session_lifetime_minutes:
        session_lifetime_days = 30
        session_lifetime_minutes = minutes_per_day * session_lifetime_days
    logging.debug('User session lifetime is set to %s minutes.', session_lifetime_minutes)
    return int(session_lifetime_minutes)
def import_local_settings():