pygments themes are customizable

doc/en/reference/customize.rst

@@ -239,3 +239,11 @@ Builtin configuration file options
 ----------------------------------------------
 
 For the full list of options consult the :ref:`reference documentation <ini options ref>`.
+
+Syntax highlighting theme customization
+---------------------------------------
+
+The syntax highlighting themes used by pytest can be customized using two environment variables:
+
+- :envvar:`PYTEST_THEME` sets a `pygment style <https://pygments.org/docs/styles/>`_ to use.
+- :envvar:`PYTEST_THEME_MODE` sets this style to *light* or *dark*.

doc/en/reference/reference.rst

@@ -1075,6 +1075,14 @@ Contains comma-separated list of modules that should be loaded as plugins:
 
     export PYTEST_PLUGINS=mymodule.plugin,xdist
 
+.. envvar:: PYTEST_THEME
+
+Sets a `pygment style <https://pygments.org/docs/styles/>`_ to use for the code output.
+
+.. envvar:: PYTEST_THEME_MODE
+
+Sets the :envvar:`PYTEST_THEME` to be either *dark* or *light*.
+
 .. envvar:: PY_COLORS
 
 When set to ``1``, pytest will use color in terminal output.