diff --git a/packages/web/src/components/ThemeProvider/index.tsx b/packages/web/src/components/ThemeProvider/index.tsx
index adecee36..f6562d80 100644
--- a/packages/web/src/components/ThemeProvider/index.tsx
+++ b/packages/web/src/components/ThemeProvider/index.tsx
@@ -1,18 +1,49 @@
-import * as React from 'react';
-import { ThemeProvider as BaseThemeProvider } from '@mui/material/styles';
 import CssBaseline from '@mui/material/CssBaseline';
+import { ThemeProvider as BaseThemeProvider } from '@mui/material/styles';
+import get from 'lodash/get';
+import set from 'lodash/set';
+import * as React from 'react';
+
+import { IJSONObject } from '@automatisch/types';
+import useConfig from 'hooks/useConfig';
 import theme from 'styles/theme';
 
 type ThemeProviderProps = {
   children: React.ReactNode;
 };
 
+const customizeTheme = (defaultTheme: typeof theme, config: IJSONObject) => {
+  for (const key in config) {
+    const value = config[key];
+    const exists = get(defaultTheme, key);
+
+    if (exists) {
+      set(defaultTheme, key, value);
+    }
+  }
+
+  return defaultTheme;
+};
+
 const ThemeProvider = ({
   children,
   ...props
 }: ThemeProviderProps): React.ReactElement => {
+  const { config, loading } = useConfig();
+
+  const customTheme = React.useMemo(() => {
+    if (!config) return theme;
+
+    const customTheme = customizeTheme(theme, config);
+
+    return customTheme;
+  }, [config]);
+
+  // TODO: maybe a global loading state for the custom theme?
+  if (loading) return <></>;
+
   return (
-    <BaseThemeProvider theme={theme} {...props}>
+    <BaseThemeProvider theme={customTheme} {...props}>
       <CssBaseline />
 
       {children}