diff --git a/components/navigation/NavbarWrapper.tsx b/components/navigation/NavbarWrapper.tsx
index f1a6f1d9..3d68d162 100644
--- a/components/navigation/NavbarWrapper.tsx
+++ b/components/navigation/NavbarWrapper.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { NO_NAVBAR_PAGES } from "@/lib/navbar";
+import { isNoNavbarPage } from "@/lib/navbar";
 import { usePathname } from "next/navigation";
 import React from "react";
 
@@ -13,7 +13,7 @@ export default function NavbarWrapper({
 }) {
   const pathname = usePathname();
 
-  if (NO_NAVBAR_PAGES.includes(pathname)) {
+  if (isNoNavbarPage(pathname)) {
     return <>{noNavbarChildren}</>;
   }
 
diff --git a/lib/navbar.ts b/lib/navbar.ts
index 10a7a0f8..1f28f4a2 100644
--- a/lib/navbar.ts
+++ b/lib/navbar.ts
@@ -47,6 +47,7 @@ export const NAVBAR_ITEMS: NavbarItem[] = [
   { label: "Events", href: "/events", icon: "calendar" },
 ];
 
+// Entries ending in "/" also match every path under them (see matchesPage).
 export const NO_NAVBAR_PAGES = [
   ORGANIZATION_NOT_FOUND_PATH,
   "/login",
@@ -56,4 +57,19 @@ export const NO_NAVBAR_PAGES = [
   "/forgotpassword",
 ];
 
+/**
+ * Whether `pathname` is one of `pages`. An entry ending in "/" matches any
+ * path under it: "/forms/" matches "/forms/abc" but not "/forms" or
+ * "/formsabc". Other entries match only the exact path.
+ */
+export function matchesPage(pathname: string, pages: readonly string[]) {
+  return pages.some((page) =>
+    page.endsWith("/") ? pathname.startsWith(page) : pathname === page,
+  );
+}
+
+export function isNoNavbarPage(pathname: string) {
+  return matchesPage(pathname, NO_NAVBAR_PAGES);
+}
+
 export const MEMBERSHIP_REDIRECT_EXCLUDED_PAGES = NO_NAVBAR_PAGES;
diff --git a/styles/globals.css b/styles/globals.css
index acbbad1e..cd27ebfb 100644
--- a/styles/globals.css
+++ b/styles/globals.css
@@ -99,6 +99,16 @@
     transparent
   );
 
+  /* Theme tokens that will follow each org's theme (#300). They hold today's
+     values, so using them changes nothing yet. */
+  --color-page-bg: #ffffff;
+  --color-page-text: var(--color-grey-text-strong);
+  /* Text on brand-colored surfaces, e.g. a primary button's label. */
+  --color-brand-foreground: #ffffff;
+  --font-display: var(--font-heading);
+  /* Corner radius for inputs and buttons (Tailwind's `rounded`). */
+  --radius-control: 0.25rem;
+
   --text-desktop-display: 48px;
   --text-desktop-heading-1: 40px;
   --text-desktop-heading-2: 32px;
diff --git a/tests/unit/components/navigation/NavbarWrapper.test.tsx b/tests/unit/components/navigation/NavbarWrapper.test.tsx
new file mode 100644
index 00000000..faa6ade1
--- /dev/null
+++ b/tests/unit/components/navigation/NavbarWrapper.test.tsx
@@ -0,0 +1,53 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { cleanup, render, screen } from "@testing-library/react";
+import NavbarWrapper from "@/components/navigation/NavbarWrapper";
+
+const pathname = vi.hoisted(() => ({ current: "/" }));
+
+vi.mock("next/navigation", () => ({
+  usePathname: () => pathname.current,
+}));
+
+// No real entry is a prefix yet (#299 and #301 add them), so add one.
+vi.mock("@/lib/navbar", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("@/lib/navbar")>();
+  const pages = [...actual.NO_NAVBAR_PAGES, "/forms/"];
+  return {
+    ...actual,
+    NO_NAVBAR_PAGES: pages,
+    isNoNavbarPage: (path: string) => actual.matchesPage(path, pages),
+  };
+});
+
+function renderAt(path: string) {
+  pathname.current = path;
+  render(
+    <NavbarWrapper noNavbarChildren={<p>without navbar</p>}>
+      <p>with navbar</p>
+    </NavbarWrapper>,
+  );
+}
+
+describe("NavbarWrapper", () => {
+  afterEach(cleanup);
+
+  it("renders the navbar layout on regular pages", () => {
+    renderAt("/events");
+    expect(screen.getByText("with navbar")).toBeTruthy();
+  });
+
+  it("renders without the navbar on excluded pages", () => {
+    renderAt("/login");
+    expect(screen.getByText("without navbar")).toBeTruthy();
+  });
+
+  it("renders without the navbar under a prefix entry", () => {
+    renderAt("/forms/camp-application-2027");
+    expect(screen.getByText("without navbar")).toBeTruthy();
+  });
+
+  it("renders the navbar on a path that only shares the prefix's letters", () => {
+    renderAt("/formsabc");
+    expect(screen.getByText("with navbar")).toBeTruthy();
+  });
+});
diff --git a/tests/unit/lib/navbar.test.ts b/tests/unit/lib/navbar.test.ts
new file mode 100644
index 00000000..99c54ced
--- /dev/null
+++ b/tests/unit/lib/navbar.test.ts
@@ -0,0 +1,34 @@
+// @vitest-environment node
+import { describe, expect, it } from "vitest";
+import { isNoNavbarPage, matchesPage, NO_NAVBAR_PAGES } from "@/lib/navbar";
+
+describe(matchesPage, () => {
+  const pages = ["/login", "/forms/"];
+
+  it("matches any path under an entry ending in /", () => {
+    expect(matchesPage("/forms/abc", pages)).toBe(true);
+    expect(matchesPage("/forms/camp-application-2027/edit", pages)).toBe(true);
+  });
+
+  it("doesn't match a path that only shares the prefix's letters", () => {
+    expect(matchesPage("/formsabc", pages)).toBe(false);
+    expect(matchesPage("/forms", pages)).toBe(false);
+  });
+
+  it("matches other entries exactly", () => {
+    expect(matchesPage("/login", pages)).toBe(true);
+    expect(matchesPage("/login/help", pages)).toBe(false);
+    expect(matchesPage("/loginx", pages)).toBe(false);
+  });
+});
+
+describe(isNoNavbarPage, () => {
+  it.each(NO_NAVBAR_PAGES)("hides the navbar on %s", (page) => {
+    expect(isNoNavbarPage(page)).toBe(true);
+  });
+
+  it("shows the navbar elsewhere", () => {
+    expect(isNoNavbarPage("/")).toBe(false);
+    expect(isNoNavbarPage("/events")).toBe(false);
+  });
+});