Allow use of hardcoded text styles in pattern encoder about log4rs HOT 8 OPEN

Colour (!) me interested in this too - like @Dango-rs, I'm moving from another log framework which exposed this feature and this would be nice to have.
If there's interest in taking it, I could look at putting together a PR to implement it?

I'm thinking I'd want to look at adding some sort of mapping from level to colour in PatternEncoder as a first step, then expose that as a configuration item. It feels like it would be too much to try to shoehorn into the pattern itself though, so (using the example YAML config) I'd do something like this:

  # An appender named "stdout" that writes to stdout
  stdout:
    kind: console
    encoder:
      pattern: "{d} {h({l})} {m}{n}"
      level_colors:
        INFO: Green
        WARN: Yellow
        ERROR: Red

Then go from those strings to Color values, using no colour where there's no match (so, for example, if I do TRACE: DeepPurple, that gets ignored).

Does that all seem reasonable?

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I recently moved to this crate due to the support of both console and file logging and I can confirm that the blue color is really unreadable on my term as well with default color settings, so i don't believe this matter should be closed.

The colors should either be updated with the same as env_logger (I was previously using that crate) or they should have the ability to be configurable. So far I didn't found any functionality how can I configure the colors from the builder.

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Right now the dark blue color (info level) is really hard to read on a black background.

It would be great if the defaults were improved for legibility, or if the colors could be made configurable.

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Your terminal controls what the colors look like: https://en.wikipedia.org/wiki/ANSI_escape_code#Colors

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Yes, but dark blue is pretty dark on most systems. Cyan as a default might be easier to read. Or a blueish color in 256-color mode.

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Ah, gotcha. I pulled the color selection from https://logback.qos.ch/manual/layouts.html#coloring but don't feel particularly strongly about the specifics.

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Does anyone still care about this? I'm going to close if not.

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consider add support for level color, just like this: ColoredLevelConfig

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