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Editorial Team
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Asked: 2026-06-11T11:07:29+00:00

I am using slf4j for logging in my Java Application. It involves a lot

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I am using slf4j for logging in my Java Application. It involves a lot logging and log monitoring.
Sometimes it is really difficult to read and find information from logs when the entire log is printed in the black color with.
Just to make it more readable, is it possible to log the different kinds of messages in different colors?
For example all Error level messages in Red color or a different font size and all Info level messages in blue color and a different font size.

Any suggestions or help is welcome.
Thnx.

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1 Answer

  1. Editorial Team

    Two solutions come to my mind. They are not colors, but alternative solutions:

    1. In your File Appender configuration, you can configure the pattern to include the log level (error, warn, etc). Then you can grep the file, to filter messages by level.

    2. You can configure two file appenders (for two separate log files) with different level threshold. For instance, one would log all the logs above debug level (so info, warn, error) into let’s say logs.txt and the other would log only the errors logs into errors.txt

    Hope it helps.

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