### 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
"""Configure Global Variables from airflow.cfg"""
    global SQL_ALCHEMY_CONN
    global DAGS_FOLDER
    global PLUGINS_FOLDER
    SQL_ALCHEMY_CONN = conf.get('core', 'SQL_ALCHEMY_CONN')
    DAGS_FOLDER = os.path.expanduser(conf.get('core', 'DAGS_FOLDER'))
    PLUGINS_FOLDER = conf.get('core', 'plugins_folder', fallback=os.path.join(AIRFLOW_HOME, 'plugins'))
def configure_orm(disable_connection_pool=False):
    """Configure ORM using SQLAlchemy"""
    from airflow.utils.log.secrets_masker import mask_secret
    log.debug("Setting up DB connection pool (PID %s)", os.getpid())
    global engine
    global Session
    engine_args = prepare_engine_args(disable_connection_pool)
    
    
    engine_args['encoding'] = conf.get('core', 'SQL_ENGINE_ENCODING', fallback='utf-8')
    if conf.has_option('core', 'sql_alchemy_connect_args'):
        connect_args = conf.getimport('core', 'sql_alchemy_connect_args')
    else:
        connect_args = {}
    engine = create_engine(SQL_ALCHEMY_CONN, connect_args=connect_args, **engine_args)
    mask_secret(engine.url.password)
    setup_event_handlers(engine)