Documentation does not describe what magic strings 'xterm' and 'css' does

[tarjei]

Describe your use-case which is not covered by existing documentation.

Hi, I tried to search for it but could not find any place where the difference between

ansiColor('xterm') and ansiColor('css') was described or elaborated. This would be helpfull.

Reference any relevant documentation, other materials or issues/pull requests that can be used for inspiration.

No response

[dblock]

These are color maps, https://github.com/jenkinsci/ansicolor-plugin/blob/master/src/main/java/hudson/plugins/ansicolor/AnsiColorMap.java#L45

Please do contribute documentation about how this works!