<configuration>

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
      <layout class="ch.qos.logback.classic.html.HTMLLayout">
        <cssBuilder class="ch.qos.logback.classic.html.UrlCssBuilder">
          <url>path_to_StyleFile.css</url>
        </cssBuilder>	
        <pattern>%-4relative [%thread] %-5level - %msg%n</pattern>
      </layout>
    </encoder>
  </appender>

  <root level="DEBUG">
    <appender-ref ref="STDOUT" />
  </root>
</configuration>

