Is there a way to change highlight color schema in LogBack

Question

In Logback, %highlight() is used to color the output. Is there any way to change the color schema for highlight()? I prefer the INFO level logs stay white instead of blue....

<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
        <Pattern>
            %d{HH:mm:ss.SSS} [%t] %highlight(%-5level %logger{36} - %msg%n)
        </Pattern>
    </encoder>
</appender>

Answer 1

I just came across an example of how to do just that

As per their documentation you need to:

1. Add HighlightingCompositeConverterEx.java to CLASSPATH (or just add it to your project)
2. load the converter class in logback.xml by using
3. Use your conversion word (highlightex in the example) in

package code.nighma.logging.utils;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.pattern.color.ANSIConstants;
import ch.qos.logback.core.pattern.color.ForegroundCompositeConverterBase;

public class LogbackHighlightCompositeConverterEx extends ForegroundCompositeConverterBase<ILoggingEvent> {

  @Override
  protected String getForegroundColorCode(ILoggingEvent event) {
    Level level = event.getLevel();
    return switch (level.toInt()) {
      case Level.ERROR_INT -> ANSIConstants.BOLD + ANSIConstants.RED_FG;
      case Level.WARN_INT -> ANSIConstants.BOLD + ANSIConstants.MAGENTA_FG;
      case Level.INFO_INT -> ANSIConstants.BOLD + ANSIConstants.CYAN_FG;
      case Level.DEBUG_INT -> ANSIConstants.BOLD + ANSIConstants.YELLOW_FG;
      case Level.TRACE_INT -> ANSIConstants.BOLD + ANSIConstants.WHITE_FG;
      default -> ANSIConstants.BOLD + ANSIConstants.DEFAULT_FG;
    };
  }
}

and then your configuration xml will look something like this

<configuration>

  <conversionRule conversionWord="highlightex" converterClass="code.nighma.logging.utils.HighlightingCompositeConverterEx"/>

  <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
    <layout class="ch.qos.logback.classic.PatternLayout">
      <Pattern>%green(%d{ISO8601}) [%blue(%t)] %highlightex(%-5level) %yellow(%C{5}): %msg%n%throwable</Pattern>
    </layout>
  </appender>

  <root level="info">
    <appender-ref ref="Console"/>
  </root>

  <logger name="code.nighma" level="trace" additivity="false">
    <appender-ref ref="Console"/>
  </logger>

</configuration>