Dynamic Theming deprecated
title: Dynamic Theming The dynamic theme plugin allows to have custom colors and logo without creating a real theme for each possible color combination. The customization information is stored in the Configuration Cascade and applied at runtime; once for the login screen, and then again immediately after login. This is necessary because before the login, the user's identity (and therefore the context ID) is not known yet. The only available information which can be used to select a theme is the domain name, i.e. the brand.
The theme generator consists of the single package
open-xchange-dynamic-theme, which is installed on the OX middleware.
Enabling the Plugin
The plugin is enabled or disabled by the capability
dynamic-theme, e.g. in a file
When using the plugin, the actual theme should be the built-in default theme. To prevent all users from changing it and hide the theme selector in the preferences, set the property
io.ox/core//theme to read-only. To do this, change the file
/opt/open-xchange/etc/meta/appsuite.yaml as follows:
io.ox/core//theme: protected: true
If some users won't use dynamic themes, this approach won't work. Instead, the theme selector can be disabled an enabled by controlling the list of available themes. The theme selector is hidden if the list is empty. To be able to do that with the Configuration Cascade, the entire list of themes needs to be specified as a single JSON value, e.g. by changing the file
/opt/open-xchange/etc/settings/appsuite.properties as follows:
Then, to hide the theme selector for users with a dynamic theme, use the Configuration Cascade to change the value to
Specifying a Theme
The package installs the file
/opt/open-xchange/etc/settings/open-xchange-dynamic-theme.properties, which contains the global defaults for the custom theme settings. Any of the settings contained in that file can be changed per-context or at any other granularity supported by the Configuration Cascade. The individual settings are as follows:
| || ||dark||The main highlight color. Setting only this variable might already be enough.|
| ||same as ||dark||Text color for links and border-less buttons.|
| ||URL of the logo in the top left corner of the top bar.|
| || ||Width of the logo as number of pixels or any CSS length unit. Set to |
| || ||Optional height of the logo as number of pixels or any CSS length unit. The maximum value is 64. Leave as |
| ||same as ||dark||Background color of the top bar.|
| || ||dark||Background of an item in the top bar when it has the keyboard focus, the mouse hovers it, or it is active.|
| || ||light||Background of selected items in the list view when the list view does not have the keyboard focus.|
| || ||light||Background of a not selected item in the list view when the mouse hovers over it.|
| ||same as ||dark||Background color of selected items in the list view when the list view has the keyboard focus.|
| || ||light||Background color of left the side panel.|
| || ||light||Background of a selected item in the side panel when the side panel does not have the keyboard focus.|
| || ||light||Background color of a not selected item in the side panel when the mouse hovers over it.|
| ||same as ||dark||Background color of a selected item in the side panel when the side panel has the keyboard focus.|
In the configuration file, each variable name must be preceded by '
io.ox/dynamic-theme//'. When referring to the value of other variables on the right side of the equals sign, (like in the default value of
linkColor) the variable names must be preceded by '
logoURL can be relative (to
/appsuite/), or absolute. When using absolute URLs to point to different hosts, use the form
//hostname/path to keep the protocol (HTTP or HTTPS) and avoid any unnecessary security warnings.
The colors can be any CSS color, as long as the restriction of the "Dark/Light" column are respected. Colors marked "dark" specify dark backgrounds with white text/icons. If the specified color is too light, accessibility will suffer. Similarly for colors labeled "light".
Theming the Login Screen
Since the login screen does not have access to a user's configuration before the user logs in, all configuration is done via
/opt/open-xchange/etc/as-config.yml. The settings in the following table apply to the login screen:
| || ||dark||Background color of the login screen.|
| || ||light||Text color of the "OX" prefix on the login screen.|
| || ||light||Text color of the "App Suite" product name on the login screen.|
| ||URL of an image which replaces the "OX App Suite" header text on the login screen.|
Each of these settings should be placed under the key
dynamicTheme like in the following example:
default: hosts: all dynamicTheme: loginColor: "#040" headerPrefixColor: "#fff"
Migration from 7.8
The configuration settings have changed between versions 7.8 and 7.10. To avoid having to upgrade all context- and user-specific entries at once, some of the new settings will be overwritten by the corresponding old settings, if the old settings are present and non-empty.
Since ConfigCascade only processes values which are present at the server level, a
.properties file with the necessary legacy settings needs to be added in
The default values in the file need to be empty to allow them being overwritten with the new values once the settings of a user or a context have been upgraded. Any new global defaults should be specified using the new settings in