diff --git a/index.html b/index.html
index f805db5..939ac37 100644
--- a/index.html
+++ b/index.html
@@ -12,7 +12,7 @@
       body,
       #root {
         min-height: 100%;
-        background-color: #dceeea;
+        background-color: #c5ddd8;
       }
 
       html,
diff --git a/src/colors.js b/src/colors.js
index d012e4c..c1471f4 100644
--- a/src/colors.js
+++ b/src/colors.js
@@ -1,2 +1,2 @@
 // Mirrored in index.html and index.css for paint before JS loads.
-export const MAIN_BACKGROUND = '#dceeea';
+export const MAIN_BACKGROUND = '#c5ddd8';
diff --git a/src/components/article/ArticleView.jsx b/src/components/article/ArticleView.jsx
index 5a877a4..75cd845 100644
--- a/src/components/article/ArticleView.jsx
+++ b/src/components/article/ArticleView.jsx
@@ -13,6 +13,7 @@ import {
   primaryPrice,
 } from '../../utils/articleDetail';
 import { formatPrice } from '../../utils/price';
+import { PANEL_TILE_KEYS } from '../../theme';
 import { formatStock } from '../../pages/artikel/searchFormat';
 
 function PanelValue({ label, children }) {
@@ -46,7 +47,6 @@ function ArticlePhoto() {
 }
 
 const headerTileSx = {
-  p: 1.25,
   minHeight: 0,
 };
 
@@ -99,6 +99,7 @@ export default function ArticleView({ article: articleData, onArticleUpdated })
     <PanelTileGrid>
       <EditablePanelTile
         wide={3}
+        tileKey={PANEL_TILE_KEYS.name}
         minHeight={0}
         sx={headerTileSx}
         value={{ name: articleData.name ?? '' }}
@@ -145,21 +146,21 @@ export default function ArticleView({ article: articleData, onArticleUpdated })
         )}
       />
 
-      <PanelTile wide={1} minHeight={0} sx={headerTileSx}>
+      <PanelTile wide={1} tileKey={PANEL_TILE_KEYS.photo} minHeight={0} sx={headerTileSx}>
         <ArticlePhoto />
       </PanelTile>
 
-      <PanelTile wide={1} title="Bestand">
+      <PanelTile wide={1} tileKey={PANEL_TILE_KEYS.stock} title="Bestand">
         <PanelValue>
           {articleData.stock != null ? formatStock(articleData.stock) : null}
         </PanelValue>
       </PanelTile>
 
-      <PanelTile wide={1} title="Marke">
+      <PanelTile wide={1} tileKey={PANEL_TILE_KEYS.brand} title="Marke">
         <PanelValue>{brandName(articleData)}</PanelValue>
       </PanelTile>
 
-      <PanelTile wide={1} title="SKU / EAN">
+      <PanelTile wide={1} tileKey={PANEL_TILE_KEYS.identifiers} title="SKU / EAN">
         <PanelValue label="SKU">{articleData.sku}</PanelValue>
         {eans.map((ean) => (
           <PanelValue key={ean} label="EAN">
@@ -168,7 +169,7 @@ export default function ArticleView({ article: articleData, onArticleUpdated })
         ))}
       </PanelTile>
 
-      <PanelTile wide={1} title="Preis">
+      <PanelTile wide={1} tileKey={PANEL_TILE_KEYS.price} title="Preis">
         <PanelValue label="Netto">
           {basePrice?.net != null ? formatPrice(basePrice.net) : null}
         </PanelValue>
@@ -180,14 +181,14 @@ export default function ArticleView({ article: articleData, onArticleUpdated })
         </PanelValue>
       </PanelTile>
 
-      <PanelTile wide={3} title="SEO & Beschreibung" minHeight={200}>
+      <PanelTile wide={3} tileKey={PANEL_TILE_KEYS.content} title="SEO & Beschreibung" minHeight={200}>
         <PanelValue label="Slug">{articleData.slug}</PanelValue>
         <PanelValue label="SEO-Titel">{articleData.seoTitle}</PanelValue>
         <PanelValue label="SEO-Beschreibung">{articleData.seoDescription}</PanelValue>
         <PanelValue label="Beschreibung">{articleData.description}</PanelValue>
       </PanelTile>
 
-      <PanelTile wide={1} title="Listen" minHeight={200}>
+      <PanelTile wide={1} tileKey={PANEL_TILE_KEYS.lists} title="Listen" minHeight={200}>
         <RelationLine
           label="Vaterartikel"
           active={articleData.childCount > 0}
diff --git a/src/components/panels/EditablePanelTile.jsx b/src/components/panels/EditablePanelTile.jsx
index 865d7c1..01dece1 100644
--- a/src/components/panels/EditablePanelTile.jsx
+++ b/src/components/panels/EditablePanelTile.jsx
@@ -8,6 +8,7 @@ import CircularProgress from '@mui/material/CircularProgress';
 import IconButton from '@mui/material/IconButton';
 import Paper from '@mui/material/Paper';
 import Typography from '@mui/material/Typography';
+import { injectMuiTheme } from './injectMuiTheme';
 import { enqueueSnackbar } from 'notistack';
 import { backendErrorFrom } from '../../utils/backendError';
 import { panelTilePaperSx } from './panelTileLayout';
@@ -20,7 +21,7 @@ function valuesEqual(a, b) {
  * Panel tile with centralized inline-edit chrome.
  * Pass `onSave` to enable edit UI; omit it for read-only tiles (no edit icon).
  */
-export class EditablePanelTile extends Component {
+class EditablePanelTileBase extends Component {
   constructor(props) {
     super(props);
     this.inputRef = createRef();
@@ -186,9 +187,11 @@ export class EditablePanelTile extends Component {
 
   render() {
     const {
+      theme,
       wide = 1,
       sx,
       minHeight = 120,
+      tileKey,
       renderDisplay,
       renderEdit,
     } = this.props;
@@ -198,8 +201,15 @@ export class EditablePanelTile extends Component {
 
     return (
       <Paper
-        variant="outlined"
-        sx={panelTilePaperSx({ wide, sx, minHeight, pending })}
+        elevation={0}
+        sx={panelTilePaperSx({
+          wide,
+          sx,
+          minHeight,
+          pending,
+          tileKey,
+          theme,
+        })}
       >
         {this.renderActions()}
         {this.renderTitle()}
@@ -220,3 +230,5 @@ export class EditablePanelTile extends Component {
     );
   }
 }
+
+export const EditablePanelTile = injectMuiTheme(EditablePanelTileBase);
diff --git a/src/components/panels/PanelTile.jsx b/src/components/panels/PanelTile.jsx
index 9c57254..c1de686 100644
--- a/src/components/panels/PanelTile.jsx
+++ b/src/components/panels/PanelTile.jsx
@@ -2,9 +2,10 @@ import { Component } from 'react';
 import Box from '@mui/material/Box';
 import Paper from '@mui/material/Paper';
 import Typography from '@mui/material/Typography';
+import { injectMuiTheme } from './injectMuiTheme';
 import { GRID_COLUMNS, panelTilePaperSx } from './panelTileLayout';
 
-export class PanelTile extends Component {
+class PanelTileBase extends Component {
   renderTitle() {
     const { title } = this.props;
     if (!title) return null;
@@ -20,12 +21,18 @@ export class PanelTile extends Component {
   }
 
   render() {
-    const { wide = 1, children, sx, minHeight = 120 } = this.props;
+    const { theme, wide = 1, children, sx, minHeight = 120, tileKey } = this.props;
 
     return (
       <Paper
-        variant="outlined"
-        sx={panelTilePaperSx({ wide, sx, minHeight })}
+        elevation={0}
+        sx={panelTilePaperSx({
+          wide,
+          sx,
+          minHeight,
+          tileKey,
+          theme,
+        })}
       >
         {this.renderTitle()}
         <Box sx={{ flex: 1, minWidth: 0 }}>{children}</Box>
@@ -34,6 +41,8 @@ export class PanelTile extends Component {
   }
 }
 
+export const PanelTile = injectMuiTheme(PanelTileBase);
+
 export function PanelTileGrid({ children, sx }) {
   return (
     <Box
diff --git a/src/components/panels/injectMuiTheme.jsx b/src/components/panels/injectMuiTheme.jsx
new file mode 100644
index 0000000..6ad40fa
--- /dev/null
+++ b/src/components/panels/injectMuiTheme.jsx
@@ -0,0 +1,13 @@
+import { useTheme } from '@mui/material/styles';
+
+/** Injects MUI theme into class components (replaces removed withTheme HOC). */
+export function injectMuiTheme(Wrapped) {
+  function ComponentWithTheme(props) {
+    const theme = useTheme();
+    return <Wrapped {...props} theme={theme} />;
+  }
+
+  const name = Wrapped.displayName || Wrapped.name || 'Component';
+  ComponentWithTheme.displayName = `injectMuiTheme(${name})`;
+  return ComponentWithTheme;
+}
diff --git a/src/components/panels/panelTileLayout.js b/src/components/panels/panelTileLayout.js
index 66760ba..e9b39ab 100644
--- a/src/components/panels/panelTileLayout.js
+++ b/src/components/panels/panelTileLayout.js
@@ -17,7 +17,21 @@ export function responsiveColumnSpan(wide) {
 
 export const PENDING_EDIT_RING_PX = 4;
 
-export function panelTilePaperSx({ wide, sx, minHeight = 120, pending = false }) {
+export function panelTileBackground(theme, tileKey) {
+  if (!tileKey || !theme?.panelTiles) return undefined;
+  return theme.panelTiles[tileKey];
+}
+
+export function panelTilePaperSx({
+  wide,
+  sx,
+  minHeight = 120,
+  pending = false,
+  tileKey,
+  theme,
+}) {
+  const tileBg = panelTileBackground(theme, tileKey);
+
   return {
     gridColumn: responsiveColumnSpan(wide),
     position: 'relative',
@@ -25,6 +39,9 @@ export function panelTilePaperSx({ wide, sx, minHeight = 120, pending = false })
     minHeight,
     display: 'flex',
     flexDirection: 'column',
+    border: 'none',
+    boxShadow: 'none',
+    ...(tileBg ? { bgcolor: tileBg } : {}),
     ...(pending
       ? {
           boxShadow: `inset 0 0 0 ${PENDING_EDIT_RING_PX}px ${PENDING_EDIT_BORDER}`,
diff --git a/src/index.css b/src/index.css
index 5859d65..68f0a94 100644
--- a/src/index.css
+++ b/src/index.css
@@ -2,7 +2,7 @@ html,
 body,
 #root {
   min-height: 100%;
-  background-color: #dceeea;
+  background-color: #c5ddd8;
 }
 
 html,
diff --git a/src/main.jsx b/src/main.jsx
index e42040e..f32854d 100644
--- a/src/main.jsx
+++ b/src/main.jsx
@@ -6,7 +6,7 @@ import { SnackbarProvider } from 'notistack';
 import AuthBootstrap from './components/AuthBootstrap';
 import App from './App';
 import { store } from './store';
-import theme from './theme';
+import { getActiveTheme } from './theme';
 import './index.css';
 
 async function clearDevServiceWorker() {
@@ -25,7 +25,7 @@ if (import.meta.env.DEV) {
 
 createRoot(document.getElementById('root')).render(
   <Provider store={store}>
-    <ThemeProvider theme={theme}>
+    <ThemeProvider theme={getActiveTheme()}>
       <CssBaseline />
       <SnackbarProvider
         maxSnack={3}
diff --git a/src/theme.js b/src/theme.js
deleted file mode 100644
index 7b77179..0000000
--- a/src/theme.js
+++ /dev/null
@@ -1,25 +0,0 @@
-import { createTheme } from '@mui/material/styles';
-import { MAIN_BACKGROUND } from './colors';
-
-const nav = {
-  background: '#1a3533',
-  mainBackground: MAIN_BACKGROUND,
-  item: '#9cb8b4',
-  itemHover: '#243f3d',
-  itemHoverText: '#d4ebe8',
-  itemActive: '#2a5a56',
-  itemActiveText: '#6ee7d8',
-  itemActiveAccent: '#2dd4bf',
-};
-
-export default createTheme({
-  palette: {
-    mode: 'light',
-    primary: { main: '#0d9488' },
-    background: {
-      default: nav.mainBackground,
-      paper: '#ffffff',
-    },
-  },
-  nav,
-});
diff --git a/src/theme/index.js b/src/theme/index.js
new file mode 100644
index 0000000..2635789
--- /dev/null
+++ b/src/theme/index.js
@@ -0,0 +1,14 @@
+export { PANEL_TILE_KEYS } from './panelTiles';
+export {
+  getActiveTheme,
+  getActiveThemeId,
+  getTheme,
+  listThemeIds,
+  registerTheme,
+  setActiveTheme,
+} from './themeManager';
+export { createDefaultTheme, defaultThemeId } from './themes/default';
+
+import { getActiveTheme } from './themeManager';
+
+export default getActiveTheme();
diff --git a/src/theme/panelTiles.js b/src/theme/panelTiles.js
new file mode 100644
index 0000000..de4c288
--- /dev/null
+++ b/src/theme/panelTiles.js
@@ -0,0 +1,11 @@
+/** Semantic keys for article view panel tile backgrounds. */
+export const PANEL_TILE_KEYS = {
+  name: 'name',
+  photo: 'photo',
+  stock: 'stock',
+  brand: 'brand',
+  identifiers: 'identifiers',
+  price: 'price',
+  content: 'content',
+  lists: 'lists',
+};
diff --git a/src/theme/themeManager.js b/src/theme/themeManager.js
new file mode 100644
index 0000000..74f0c33
--- /dev/null
+++ b/src/theme/themeManager.js
@@ -0,0 +1,38 @@
+import { createDefaultTheme, defaultThemeId } from './themes/default.js';
+
+const themes = {
+  [defaultThemeId]: createDefaultTheme(),
+};
+
+let activeThemeId = defaultThemeId;
+
+export function getTheme(themeId = activeThemeId) {
+  const theme = themes[themeId];
+  if (!theme) {
+    throw new Error(`Unknown theme: ${themeId}`);
+  }
+  return theme;
+}
+
+export function getActiveTheme() {
+  return getTheme(activeThemeId);
+}
+
+export function getActiveThemeId() {
+  return activeThemeId;
+}
+
+export function setActiveTheme(themeId) {
+  if (!themes[themeId]) {
+    throw new Error(`Unknown theme: ${themeId}`);
+  }
+  activeThemeId = themeId;
+}
+
+export function listThemeIds() {
+  return Object.keys(themes);
+}
+
+export function registerTheme(themeId, theme) {
+  themes[themeId] = theme;
+}
diff --git a/src/theme/themes/default.js b/src/theme/themes/default.js
new file mode 100644
index 0000000..ec3c2d1
--- /dev/null
+++ b/src/theme/themes/default.js
@@ -0,0 +1,42 @@
+import { createTheme } from '@mui/material/styles';
+import { MAIN_BACKGROUND } from '../../colors';
+import { PANEL_TILE_KEYS } from '../panelTiles';
+
+const nav = {
+  background: '#1a3533',
+  mainBackground: MAIN_BACKGROUND,
+  item: '#9cb8b4',
+  itemHover: '#243f3d',
+  itemHoverText: '#d4ebe8',
+  itemActive: '#2a5a56',
+  itemActiveText: '#6ee7d8',
+  itemActiveAccent: '#2dd4bf',
+};
+
+const panelTiles = {
+  [PANEL_TILE_KEYS.name]: '#ffffff',
+  [PANEL_TILE_KEYS.photo]: '#fde68a',
+  [PANEL_TILE_KEYS.stock]: '#bbf7d0',
+  [PANEL_TILE_KEYS.brand]: '#e9d5ff',
+  [PANEL_TILE_KEYS.identifiers]: '#e2e8f0',
+  [PANEL_TILE_KEYS.price]: '#bfdbfe',
+  [PANEL_TILE_KEYS.content]: '#99f6e4',
+  [PANEL_TILE_KEYS.lists]: '#fbcfe8',
+};
+
+export const defaultThemeId = 'default';
+
+export function createDefaultTheme() {
+  return createTheme({
+    palette: {
+      mode: 'light',
+      primary: { main: '#0d9488' },
+      background: {
+        default: nav.mainBackground,
+        paper: '#ffffff',
+      },
+    },
+    nav,
+    panelTiles,
+  });
+}
diff --git a/vite.config.js b/vite.config.js
index 11a6fca..4e24a70 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -134,7 +134,7 @@ export default defineConfig(({ command }) => ({
               start_url: '/',
               scope: '/',
               display: 'standalone',
-              background_color: '#dceeea',
+              background_color: '#c5ddd8',
               theme_color: '#3b5bdb',
               icons: [
                 {