[jira] [Created] (LOG4J2-3538) Add support for 24 colors for highlighting

[Pavel_K (Jira)]

Pavel_K created LOG4J2-3538:
-------------------------------

             Summary: Add support for 24 colors for highlighting
                 Key: LOG4J2-3538
                 URL: https://issues.apache.org/jira/browse/LOG4J2-3538
             Project: Log4j 2
          Issue Type: Bug
            Reporter: Pavel_K


Currently for highlighting in pattern layout we have only 16 colors, for 
example:

{code:java}
 <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} 
%highlight{[%level]}{FATAL=red bright} [%t] %logger{36} - %msg%n" 
disableAnsi="false"/>
{code}

At the same time true colors in SGR function are also 
[supported|https://en.wikipedia.org/wiki/ANSI_escape_code#24-bit]. So, I 
suggest to add support of this colors, for example this way:

{code:java}
 <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} 
%highlight{[%level]}{FATAL=#ff0000} [%t] %logger{36} - %msg%n" 
disableAnsi="false"/>
{code}

and generated code should be:

{code:java}
ESC[38;2;255;0;0m
{code}




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