log4j configuration with different colors for different log levels - also works with Eclipse Ansi Console: http://mihai-nita.net/2013/06/03/eclipse-plugin-ansi-in-console/

log4j.properties

log4j.debug=false

# Default level is INFO
log4j.rootLogger=INFO,StdoutErrorFatal,StdoutWarn,StdoutInfo,StdoutDebug,StdoutTrace

# and for com.some.package.* log everything
log4j.logger.com.some.package=TRACE

log4j.appender.StdoutErrorFatal=org.apache.log4j.ConsoleAppender
log4j.appender.StdoutErrorFatal.layout=org.apache.log4j.PatternLayout
log4j.appender.StdoutErrorFatal.layout.conversionPattern=\u001b[31;1m%d{HH:mm:ss,SSS} %-5p - %-26c - [user:%X{username}] %m\n
log4j.appender.StdoutErrorFatal.threshold=ERROR

log4j.appender.StdoutWarn=org.apache.log4j.ConsoleAppender
log4j.appender.StdoutWarn.layout=org.apache.log4j.PatternLayout
log4j.appender.StdoutWarn.layout.conversionPattern=\u001b[33;1m%d{HH:mm:ss,SSS} %-5p - %-26c - [user:%X{username}] %m\n
log4j.appender.StdoutWarn.threshold=WARN
log4j.appender.StdoutWarn.filter.filter1=org.apache.log4j.varia.LevelRangeFilter
log4j.appender.StdoutWarn.filter.filter1.levelMin=WARN
log4j.appender.StdoutWarn.filter.filter1.levelMax=WARN

log4j.appender.StdoutInfo=org.apache.log4j.ConsoleAppender
log4j.appender.StdoutInfo.layout=org.apache.log4j.PatternLayout
log4j.appender.StdoutInfo.layout.conversionPattern=\u001b[0m%d{HH:mm:ss,SSS} %-5p - %-26c - [user:%X{username}] %m\n
log4j.appender.StdoutInfo.threshold=INFO
log4j.appender.StdoutInfo.filter.filter1=org.apache.log4j.varia.LevelRangeFilter
log4j.appender.StdoutInfo.filter.filter1.levelMin=INFO
log4j.appender.StdoutInfo.filter.filter1.levelMax=INFO

log4j.appender.StdoutDebug=org.apache.log4j.ConsoleAppender
log4j.appender.StdoutDebug.layout=org.apache.log4j.PatternLayout
log4j.appender.StdoutDebug.layout.conversionPattern=\u001b[0;36m%d{HH:mm:ss,SSS} %-5p - %-26c - [user:%X{username}] %m\n
log4j.appender.StdoutDebug.threshold=DEBUG
log4j.appender.StdoutDebug.filter.filter1=org.apache.log4j.varia.LevelRangeFilter
log4j.appender.StdoutDebug.filter.filter1.levelMin=DEBUG
log4j.appender.StdoutDebug.filter.filter1.levelMax=DEBUG

log4j.appender.StdoutTrace=org.apache.log4j.ConsoleAppender
log4j.appender.StdoutTrace.layout=org.apache.log4j.PatternLayout
log4j.appender.StdoutTrace.layout.conversionPattern=\u001b[0;30;1m%d{HH:mm:ss,SSS} %-5p - %-26c - [user:%X{username}] %m\n
log4j.appender.StdoutTrace.threshold=TRACE
log4j.appender.StdoutTrace.filter.filter1=org.apache.log4j.varia.LevelRangeFilter
log4j.appender.StdoutTrace.filter.filter1.levelMin=TRACE
log4j.appender.StdoutTrace.filter.filter1.levelMax=TRACE