Update content page bg color documentation

docs/CONTENT_CREATION_GUIDE.md

@@ -48,6 +48,8 @@ related: ["slug-of-related-article-1", "slug-of-related-article-2"]
 thumbnail:
   vertical: "your-article-slug-vertical.svg"
   horizontal: "your-article-slug-horizontal.svg"
+background:
+  color: "#F4F3F1" # Page background color (hex)
 ---
 ```
 
@@ -59,6 +61,7 @@ thumbnail:
 - **date**: Publication date in YYYY-MM-DD format
 - **related**: Array of article slugs (use filename without .md)
 - **thumbnail**: Custom images for article thumbnails (optional)
+- **background.color**: Page background color as a hex code (e.g., `#F4F3F1`)
 
 ### Related Articles
 
@@ -101,6 +104,15 @@ Add custom thumbnail images to make your article stand out:
 
 If no thumbnails are provided, default images will be used.
 
+## Background Color
+
+Set the content page background using a hex color in frontmatter:
+
+```yaml
+background:
+  color: "#F4F3F1" # Use any valid hex code
+```
+
 ## File Naming
 
 Use descriptive, URL-friendly filenames:

stories/ContentBanner.stories.js

@@ -20,7 +20,7 @@ export default {
     docs: {
       description: {
         component:
-          "The ContentBanner component displays the header information for blog articles, including title, description, author, and date.",
+          "The ContentBanner component displays the header information for blog articles, including title, description, author, and date. Note: page background colors are applied at the blog page level using a hex color from frontmatter (background.color), not inside this component. Thumbnail images should be uploaded via the content pipeline to public/content/blog/ and referenced in frontmatter (thumbnail.horizontal / thumbnail.vertical).",
       },
     },
   },

tests/unit/BlogPage.test.jsx

@@ -129,10 +129,11 @@ describe("BlogPostPage", () => {
     expect(mainContainer).toBeInTheDocument();
     expect(mainContainer).toHaveClass(
       "min-h-screen",
-      "bg-[#F4F3F1]",
       "relative",
-      "overflow-hidden",
+      "overflow-hidden"
     );
+    // Background color is applied via inline style from frontmatter hex
+    expect(mainContainer).toHaveStyle({ backgroundColor: expect.any(String) });
   });
 
   it("renders the content banner", async () => {
@@ -144,7 +145,7 @@ describe("BlogPostPage", () => {
     expect(screen.getByTestId("content-banner")).toBeInTheDocument();
     expect(screen.getByText("Test Article Title")).toBeInTheDocument();
     expect(
-      screen.getByText("This is a test article description"),
+      screen.getByText("This is a test article description")
     ).toBeInTheDocument();
   });
 
@@ -158,7 +159,7 @@ describe("BlogPostPage", () => {
     expect(article).toBeInTheDocument();
     expect(article).toHaveClass(
       "p-[var(--spacing-scale-024)]",
-      "sm:py-[var(--spacing-scale-032)]",
+      "sm:py-[var(--spacing-scale-032)]"
     );
 
     // Check content is rendered
@@ -188,7 +189,7 @@ describe("BlogPostPage", () => {
     expect(screen.getByTestId("ask-organizer")).toBeInTheDocument();
     expect(screen.getByText("Still have questions?")).toBeInTheDocument();
     expect(
-      screen.getByText("Get answers from an experienced organizer"),
+      screen.getByText("Get answers from an experienced organizer")
     ).toBeInTheDocument();
     expect(screen.getByText("Ask an organizer")).toBeInTheDocument();
   });
@@ -220,7 +221,7 @@ describe("BlogPostPage", () => {
     expect(contentDiv).toHaveClass("post-body");
     expect(contentDiv).toHaveClass("-mt-[var(--spacing-scale-048)]");
     expect(contentDiv).toHaveClass(
-      "text-[var(--color-content-inverse-primary)]",
+      "text-[var(--color-content-inverse-primary)]"
     );
     expect(contentDiv).toHaveClass("text-[16px]");
     expect(contentDiv).toHaveClass("leading-[24px]");
@@ -267,7 +268,7 @@ describe("BlogPostPage", () => {
 
     // Check for script elements using querySelector since RTL ignores them
     const scripts = document.querySelectorAll(
-      'script[type="application/ld+json"]',
+      'script[type="application/ld+json"]'
     );
     expect(scripts).toHaveLength(2);
 
@@ -285,7 +286,7 @@ describe("BlogPostPage", () => {
     // The component should throw an error when post is null
     // This happens because notFound() is called
     await expect(
-      BlogPostPage({ params: { slug: "non-existent" } }),
+      BlogPostPage({ params: { slug: "non-existent" } })
     ).rejects.toThrow();
   });
 
@@ -297,7 +298,7 @@ describe("BlogPostPage", () => {
 
     // Current post should not appear in related articles
     expect(
-      screen.queryByTestId("related-test-article"),
+      screen.queryByTestId("related-test-article")
     ).not.toBeInTheDocument();
 
     // Other related posts should appear
@@ -322,7 +323,7 @@ describe("BlogPostPage", () => {
       "top-1/4",
       "right-0",
       "pointer-events-none",
-      "z-10",
+      "z-10"
     );
 
     // Second shape (left side)
@@ -334,7 +335,7 @@ describe("BlogPostPage", () => {
       "top-1/2",
       "left-0",
       "pointer-events-none",
-      "z-10",
+      "z-10"
     );
   });