diff --git a/app/features/team/TeamRepository.server.ts b/app/features/team/TeamRepository.server.ts
index f7af186b5..0e97cb7a2 100644
--- a/app/features/team/TeamRepository.server.ts
+++ b/app/features/team/TeamRepository.server.ts
@@ -311,10 +311,7 @@ export async function update({
 	bio,
 	bsky,
 	tag,
-	customTheme,
-}: Pick<Insertable<Tables["Team"]>, "id" | "name" | "bio" | "bsky" | "tag"> & {
-	customTheme: CustomTheme | null;
-}) {
+}: Pick<Insertable<Tables["Team"]>, "id" | "name" | "bio" | "bsky" | "tag">) {
 	const customUrl = mySlugify(name);
 
 	const team = await db
@@ -325,7 +322,6 @@ export async function update({
 			bio,
 			bsky,
 			tag,
-			customTheme: customTheme ? JSON.stringify(customTheme) : null,
 		})
 		.where("id", "=", id)
 		.returningAll()
diff --git a/app/features/team/actions/t.$customUrl.edit.server.test.ts b/app/features/team/actions/t.$customUrl.edit.server.test.ts
index 6e1888b2f..3cb64917f 100644
--- a/app/features/team/actions/t.$customUrl.edit.server.test.ts
+++ b/app/features/team/actions/t.$customUrl.edit.server.test.ts
@@ -1,4 +1,8 @@
 import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { REGULAR_USER_TEST_ID } from "~/db/seed/constants";
+import { db } from "~/db/sql";
+import * as TeamRepository from "~/features/team/TeamRepository.server";
+import { clampThemeToGamut } from "~/utils/oklch-gamut";
 import {
 	assertResponseErrored,
 	dbInsertUsers,
@@ -20,7 +24,7 @@ const editTeamProfileAction = wrappedAction<typeof editTeamSchema>({
 	isJsonSubmission: true,
 });
 
-const DEFAULT_FIELDS = {
+const DEFAULT_EDIT_FIELDS = {
 	_action: "EDIT",
 	name: "Team 1",
 	bio: "",
@@ -28,6 +32,31 @@ const DEFAULT_FIELDS = {
 	tag: "",
 } as const;
 
+const VALID_CUSTOM_THEME = {
+	baseHue: 180,
+	baseChroma: 0.05,
+	accentHue: 200,
+	accentChroma: 0.1,
+	chatHue: null,
+	radiusBox: 3,
+	radiusField: 2,
+	radiusSelector: 2,
+	borderWidth: 2,
+	sizeField: 1,
+	sizeSelector: 1,
+	sizeSpacing: 1,
+} as const;
+
+const expectedStoredTheme = () =>
+	JSON.parse(JSON.stringify(clampThemeToGamut(VALID_CUSTOM_THEME)));
+
+const makeUserPatron = () =>
+	db
+		.updateTable("User")
+		.set({ patronTier: 2 })
+		.where("id", "=", REGULAR_USER_TEST_ID)
+		.execute();
+
 describe("team page editing", () => {
 	beforeEach(async () => {
 		await dbInsertUsers();
@@ -37,65 +66,85 @@ describe("team page editing", () => {
 		dbReset();
 	});
 
-	it("adds valid custom theme", async () => {
+	it("sets a custom theme via UPDATE_CUSTOM_THEME", async () => {
+		await makeUserPatron();
+
 		const response = await editTeamProfileAction(
 			{
-				customTheme: {
-					baseHue: 180,
-					baseChroma: 0.05,
-					accentHue: 200,
-					accentChroma: 0.1,
-					chatHue: null,
-					radiusBox: 3,
-					radiusField: 2,
-					radiusSelector: 2,
-					borderWidth: 2,
-					sizeField: 1,
-					sizeSelector: 1,
-					sizeSpacing: 1,
-				},
-				...DEFAULT_FIELDS,
+				_action: "UPDATE_CUSTOM_THEME",
+				newValue: VALID_CUSTOM_THEME,
 			},
 			{ user: "regular", params: { customUrl: "team-1" } },
 		);
 
-		expect(response.status).toBe(302);
+		expect(response).toEqual({ ok: true });
+
+		const team = await TeamRepository.findByCustomUrl("team-1");
+		expect(team?.customTheme).toEqual(expectedStoredTheme());
 	});
 
-	it("allows null custom theme", async () => {
-		const response = await editTeamProfileAction(
+	it("clears a custom theme via UPDATE_CUSTOM_THEME with null", async () => {
+		await makeUserPatron();
+
+		await editTeamProfileAction(
 			{
-				customTheme: null,
-				...DEFAULT_FIELDS,
+				_action: "UPDATE_CUSTOM_THEME",
+				newValue: VALID_CUSTOM_THEME,
 			},
 			{ user: "regular", params: { customUrl: "team-1" } },
 		);
 
-		expect(response.status).toBe(302);
-	});
-
-	it("prevents adding custom theme with invalid values", async () => {
 		const response = await editTeamProfileAction(
 			{
-				customTheme: {
+				_action: "UPDATE_CUSTOM_THEME",
+				newValue: null,
+			},
+			{ user: "regular", params: { customUrl: "team-1" } },
+		);
+
+		expect(response).toEqual({ ok: true });
+
+		const team = await TeamRepository.findByCustomUrl("team-1");
+		expect(team?.customTheme).toBeNull();
+	});
+
+	it("prevents setting an invalid custom theme", async () => {
+		await makeUserPatron();
+
+		const response = await editTeamProfileAction(
+			{
+				_action: "UPDATE_CUSTOM_THEME",
+				newValue: {
+					...VALID_CUSTOM_THEME,
 					baseHue: 500, // Invalid: max is 360
-					baseChroma: 0.05,
-					accentHue: 200,
-					accentChroma: 0.1,
-					chatHue: null,
-					radiusBox: 3,
-					radiusField: 2,
-					radiusSelector: 2,
-					borderWidth: 2,
-					sizeField: 1,
-					sizeSelector: 1,
-					sizeSpacing: 1,
 				},
-				...DEFAULT_FIELDS,
 			},
 			{ user: "regular", params: { customUrl: "team-1" } },
 		);
 
 		assertResponseErrored(response);
 	});
+
+	it("preserves an existing custom theme when editing the team profile", async () => {
+		await makeUserPatron();
+
+		await editTeamProfileAction(
+			{
+				_action: "UPDATE_CUSTOM_THEME",
+				newValue: VALID_CUSTOM_THEME,
+			},
+			{ user: "regular", params: { customUrl: "team-1" } },
+		);
+
+		const response = await editTeamProfileAction(
+			{ ...DEFAULT_EDIT_FIELDS, bio: "Updated bio" },
+			{ user: "regular", params: { customUrl: "team-1" } },
+		);
+
+		expect(response.status).toBe(302);
+
+		const team = await TeamRepository.findByCustomUrl("team-1");
+		expect(team?.customTheme).toEqual(expectedStoredTheme());
+		expect(team?.bio).toBe("Updated bio");
+	});
 });
diff --git a/app/features/team/actions/t.$customUrl.edit.server.ts b/app/features/team/actions/t.$customUrl.edit.server.ts
index 44cb20e87..f05856b49 100644
--- a/app/features/team/actions/t.$customUrl.edit.server.ts
+++ b/app/features/team/actions/t.$customUrl.edit.server.ts
@@ -87,15 +87,9 @@ export const action: ActionFunction = async ({ request, params }) => {
 				return { errors: ["forms:errors.duplicateName"] };
 			}
 
-			const customTheme =
-				canAddCustomizedColors(team) && data.customTheme
-					? clampThemeToGamut(data.customTheme)
-					: null;
-
 			const updatedTeam = await TeamRepository.update({
 				id: team.id,
 				...data,
-				customTheme,
 			});
 
 			throw redirect(teamPage(updatedTeam.customUrl));
diff --git a/app/features/team/team-schemas.server.ts b/app/features/team/team-schemas.server.ts
index f6ec1db1f..1aa2f26ac 100644
--- a/app/features/team/team-schemas.server.ts
+++ b/app/features/team/team-schemas.server.ts
@@ -61,10 +61,6 @@ export const editTeamSchema = z.union([
 			falsyToNull,
 			z.string().max(TEAM.TAG_MAX_LENGTH).nullable(),
 		),
-		customTheme: z.preprocess(
-			(val) => (!val || val === "null" ? null : val),
-			themeInputSchema.nullable(),
-		),
 	}),
 ]);