logback.groovy

 import ch.qos.logback.classic.boolex.GEventEvaluator
 import ch.qos.logback.classic.encoder.PatternLayoutEncoder
 import ch.qos.logback.core.ConsoleAppender
 import ch.qos.logback.core.filter.EvaluatorFilter
 import static ch.qos.logback.classic.Level.DEBUG 
 import static ch.qos.logback.core.spi.FilterReply.DENY
 import static ch.qos.logback.core.spi.FilterReply.NEUTRAL 

 appender("CONSOLE", ConsoleAppender) {
    encoder(PatternLayoutEncoder) {
        pattern = "[%thread] %-5level %logger{15} - %msg %n"    }
    filter(EvaluatorFilter) {
        evaluator(GEventEvaluator) {
            expression = "!(e.getLoggerName().contains('com.finnjohnsen'))"        }
        onMismatch = DENY        onMatch = NEUTRAL    }
 }

 appender("COLOR_CONSOLE", ConsoleAppender) {
    withJansi = true    encoder(PatternLayoutEncoder) {
        pattern = "[%thread] %highlight(%-5level) %boldWhite(%logger{15}) - %boldYellow(%msg) %n"    }
 }
 root(DEBUG, ["CONSOLE"])
 logger("com.finnjohnsen", DEBUG, ["COLOR_CONSOLE"])