diff --git a/README.md b/README.md
index 431e3f9..05d79b5 100644
--- a/README.md
+++ b/README.md
@@ -138,24 +138,24 @@ You can modify the styles of the user interface using CSS variables. The CSS var
 --name-of-variable-one:value1;--name-of-variable-two:value2
 ```
 
-The following table contains the CSS variables you can modify to change the user interface:
-
-| CSS Variable                   | Default | Description                                                        |
-|--------------------------------|---------|--------------------------------------------------------------------|
-| --event-background-color       | #007e89 | The color for the background of the event agenda.                  |
-| --event-title-color            | #003861 | The color for the title of the event agenda.                       |
-| --event-text-color             | #003861 | The color for the text of the event agenda.                        |
-| --event-running-session-color  | #9bf4ff | The color for the background of rooms with running sessions.       |
-| --event-next-session-color     | #62d7e3 | The color for the background of rooms with sessions starting next. |
-| --event-closed-room-color      | #5da6b2 | The color for the background of closed rooms.                      |
-| --event-room-border            | none    | The border for the event room.                                     |
-| --social-background-color      | #1aa3b1 | The color for the background of the social wall.                   |
-| --social-title-color           | #003861 | The color for the title of the social wall.                        |
-| --social-text-color            | #003861 | The color for the text of the social wall.                         |
-| --social-post-background-color | #84ddee | The color for the background of social posts.                      |
-| --social-post-border           | none    | The border for the social posts.                                   |
-
-The custom styles of some events are documented below.
+The following table contains the CSS variables you can modify to change the user interface and their default values:
+
+| CSS Variable                   | Default           | Description                                                        |
+|--------------------------------|-------------------|--------------------------------------------------------------------|
+| --event-background-color       | #e7eaee           | The color for the background of the event agenda.                  |
+| --event-title-color            | #262626           | The color for the title of the event agenda.                       |
+| --event-text-color             | #262626           | The color for the text of the event agenda.                        |
+| --event-running-session-color  | #ffffff           | The color for the background of rooms with running sessions.       |
+| --event-next-session-color     | #eeeeee           | The color for the background of rooms with sessions starting next. |
+| --event-closed-room-color      | #cccccc           | The color for the background of closed rooms.                      |
+| --event-room-border            | 1px solid #909090 | The border for the event room.                                     |
+| --social-background-color      | #e7eaee           | The color for the background of the social wall.                   |
+| --social-title-color           | #262626           | The color for the title of the social wall.                        |
+| --social-text-color            | #262626           | The color for the text of the social wall.                         |
+| --social-post-background-color | #ffffff           | The color for the background of social posts.                      |
+| --social-post-border           | 1px solid #909090 | The border for the social posts.                                   |
+
+Default values may change in newer versions of *Apus*. The custom styles of some events are documented below.
 
 #### Java Forum Stuttgart
 
diff --git a/frontend/themes/apus/styles.css b/frontend/themes/apus/styles.css
index fbbd262..8955290 100644
--- a/frontend/themes/apus/styles.css
+++ b/frontend/themes/apus/styles.css
@@ -17,19 +17,19 @@
  */
 
 :root {
-    --event-background-color: #007e89;
-    --event-title-color: #003861;
-    --event-text-color: #003861;
-    --event-running-session-color: #9bf4ff;
-    --event-next-session-color: #62d7e3;
-    --event-closed-room-color: #5da6b2;
-    --event-room-border: none;
+    --event-background-color: #e7eaee;
+    --event-title-color: #262626;
+    --event-text-color: #262626;
+    --event-running-session-color: #ffffff;
+    --event-next-session-color: #eeeeee;
+    --event-closed-room-color: #cccccc;
+    --event-room-border: 1px solid #909090;
 
-    --social-background-color: #1aa3b1;
-    --social-title-color: #003861;
-    --social-text-color: #003861;
-    --social-post-background-color: #84ddee;
-    --social-post-border: none;
+    --social-background-color: #e7eaee;
+    --social-title-color: #262626;
+    --social-text-color: #262626;
+    --social-post-background-color: #ffffff;
+    --social-post-border: 1px solid #909090;
 
     background-color: #000000;
 }