### 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/utils/state.py
TaskInstanceState.UP_FOR_RESCHEDULE,
            TaskInstanceState.DEFERRED,
        ]
    )
    """
    A list of states indicating that a task either has not completed
    a run or has not even started.
    """
    failed_states: FrozenSet[TaskInstanceState] = frozenset(
        [TaskInstanceState.FAILED, TaskInstanceState.UPSTREAM_FAILED]
    )
    """
    A list of states indicating that a task or dag is a failed state.
    """
    success_states: FrozenSet[TaskInstanceState] = frozenset(
        [TaskInstanceState.SUCCESS, TaskInstanceState.SKIPPED]
    )
    """
    A list of states indicating that a task or dag is a success state.
    """
    terminating_states = frozenset([TaskInstanceState.SHUTDOWN, TaskInstanceState.RESTARTING])
    """
    A list of states indicating that a task has been terminated.
    """
class PokeState:
    """Static class with poke states constants used in smart operator."""
    LANDED = 'landed'
    NOT_LANDED = 'not_landed'
    POKE_EXCEPTION = 'poke_exception'