<context-param>
    <param-name>javax.faces.WEBAPP_RESOURCES_DIRECTORY</param-name>
    <param-value>/WEB-INF/resources</param-value>
</context-param>
<context-param>
    <param-name>primefaces.THEME</param-name>
    <param-value>dark-hive</param-value>
</context-param>

<dependency>
    <groupId>org.primefaces.themes</groupId>
    <artifactId>dark-hive</artifactId>
    <version>1.0.8</version>
</dependency>