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</refsect1>
<refsect1>
+ <title>Environment</title>
+
+ <para>
+ The environment variable <envar>PG_COLOR</envar> specifies whether to use
+ color in diagnostic messages. Possible values are
+ <literal>always</literal>, <literal>auto</literal> and
+ <literal>never</literal>.
+ </para>
+ </refsect1>
+
+ <refsect1>
<title>See Also</title>
<simplelist type="inline">