You can either deploy the themes by copying to the themes folder or as modules.

Simplest way to deploy the themes is to copy src/main/resources/theme/* to themes/.

Alternatively you can deploy as modules. This can be done by first running:

mvn clean install
$KEYCLOAK_HOME/bin/jboss-cli.sh --command="module add --name=org.keycloak.example.themes --resources=target/keycloak-example-themes.jar"

Then open standalone/configuration/standalone.xml and register the theme module by adding:

<theme>
    ...
    <modules>
        <module>org.keycloak.example.themes</module>
    </modules>
</theme>

Example theme that adds address fields to registration page, account management and admin console. To enable the theme open the admin console, select your realm, click on Theme. In the dropdown for Login Theme and Account Theme select address. Click Save and login to the realm to see the new theme in action.

One thing to note is that to change the admin console for the master admin console (/auth/admin) you need to change the theme for the master realm. Changing the admin console theme for any other realms will only change the admin console for that specific realm (for example /auth/admin/myrealm/console).

Example login theme that changes the look of the login forms. To enable the theme open the admin console, select your realm, click on Theme. In the dropdown for Login Theme select sunrise. Click Save and login to the realm to see the new theme in action.

To enable the theme open the admin console, select your realm, click on Theme. In the dropdowns for Login Theme, Account Theme and Admin Console Theme select logo-example. Click Save and login to the realm to see the new theme in action.

To change the theme for the welcome pages open standalone/configuration/standalone.xml find the config for theme and add 'welcomeTheme':

<theme>
    ...
    <welcomeTheme>logo-example</welcomeTheme>
</theme>

One thing to note is that to change the admin console for the master admin console (/auth/admin) you need to change the theme for the master realm. Changing the admin console theme for any other realms will only change the admin console for that specific realm (for example /auth/admin/myrealm/console).