How to customize option and command name colors in --help?

[malici0us-link]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the Typer documentation, with the integrated search.
• I already searched in Google "How to X in Typer" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to Typer but to Click.

Commit to Help

• I commit to help with one of those options 👆

Example Code

import typer
from typing import Annotated, Optional, List, Tuple
from rich import print as rprint

# Create Typer instance
app = typer.Typer(
    rich_markup_mode="rich",
    epilog="Made with [green]❤️[/green] on planet Earth.",
)

@app.callback()
def decorator_callback(
        authenticated: Annotated[bool, typer.Option(
            "[red]--auth[/red]", # This doesn't work — how do I change the option color?
            help="This is a [red]global top-level option[/red] defined in app.callback()."
        )] = False,
        verbose: Annotated[bool, typer.Option(
            help="This is [red]another global top-level option[/red] defined in app.callback().\n\n"
        )] = False,
):
    pass

if __name__ == "__main__":
    app()

Description

How do you change the color of options and commands in --help? By default they are both a bright blue. Also, if you are using a boolean option, the negative boolean "--no-example" is purple. How can I change these bright blue and purple colors? I tried the code snippet I've attached here, but that doesn't seem to work. As you can see, in the code snippet, Rich syntax works for the help parameter ([red]global top-level option[/red] and red]another global top-level option[/red] work) and the epilog (the heart turns green), but it doesn't work when declaring the name of your option.

Operating System

macOS

Operating System Details

No response

Typer Version

0.9.0

Python Version

3.11.4

Additional Context

[dexma-dev]

@malici0us-link any updates on this?
I would really like to have more control over the default colors of typer. @tiangolo any idea?

[Tremeschin]

@malici0us-link @dexma-dev

I wanted to change the color of the type hinting / ranges, as yellow was too intrusive, I did it doing the following:

import typer.rich_utils

# Note: Must be `module.var = "Value"`, as `from typer.rich_utils import STYLE_METAVAR`
# copies the variable definition to this local file and doesn't change values upstream
typer.rich_utils.STYLE_METAVAR = "dim"

# (...)

There's a lot of color constants defined there, go for some trial and error, should do it :)

[DavidWalshe93]

Thanks @Tremeschin 💯 This is ideal for helping end-users that suffer from color-impairment and cannot see the default styling very well :)

[Tremeschin]

@DavidWalshe93 That's an awesome use case we all should think more often! 🙂

I forgot to mention in the previous comment (a couple months old hehe) that one can find all available colors and styles in the rich docs. I've also ended up using using the following style modifications on my projects:

typer.rich_utils.STYLE_METAVAR = "italic grey42"
typer.rich_utils.STYLE_OPTIONS_PANEL_BORDER = "bold grey42"
typer.rich_utils.STYLE_OPTION_DEFAULT = "bold bright_black"
typer.rich_utils.DEFAULT_STRING = "(default: {})"
typer.rich_utils.STYLE_OPTIONS_TABLE_PADDING = (0, 1, 0, 0)

y'know, maybe someone could compile these custom stylings somewhere in one of those awesome-typer-styles type of repo 😆