docs: Add user guide for change stream color.

templates/zerver/help/change-stream-color.md

@@ -0,0 +1,38 @@
+# Change Stream Color
+Zulip allows you to change stream colors to better customize an environment
+that best suites you.
+
+### Using the streams sidebar
+The streams sidebar is the fastest approach to changing the color of a stream, to use this:
+
+1. Hover your cursor over the stream you would like to edit, then click the **down chevron**(![Down chevron](/static/images/help/chevron.png)) that will appear to the right of the stream name.
+2. From the pop-up menu select your desired stream color from the preset colors or open the color picker by clicking **Choose custom color**.
+
+![Change Stream Color](/static/images/help/stream-left-sidebar-color.png)
+
+You can also edit the color of a Stream from the **Subscriptions page**.
+
+### Finding the subscriptions page
+There are multiple ways to navigate to the subscriptions page. You can either:
+
+1. Click the **cog** (![cog](/static/images/help/cog.png)) icon in the top right corner.
+2. Select the **Manage Streams** option from the dropdown menu.
+
+![settings](/static/images/help/settings-dropdown-streams.png)
+
+or
+
+1. Click the **cog** (![cog](/static/images/help/cog.png)) icon located in the **left sidebar** next to **Streams**
+
+![Streams Cog](/static/images/help/streams-1.png)
+
+### Change color
+Once on the **subscriptions page**:
+
+1. Select the stream you want to edit by either searching for its name or finding it in the streams list.
+2. Under the **Stream Settings** section, select the **Stream Color** option.
+3. From the window select either a preset color, use the color picker, or enter the hex code of your desired color.
+
+<img src="/static/images/help/subscriptions-change-color.png" alt="Subscriptions Change Color" style="width: 50%;"/>
+
+Congratulations, you're finished! You can now exit the **subscriptions page** by clicking the "**X**" in the top right corner of the modal.

templates/zerver/help/index.md

@@ -92,7 +92,7 @@ as a “**realm**”.
 * Unsubscribe from a stream
 * Change who can join a stream
 * Pin a stream
-* Change the color of a stream
+* [Change the color of a stream](/help/change-stream-color)
 * Message a stream by email
 * Convert a group PM to a private stream (not implemented)
 * Remove someone from a stream