diff --git a/maternal-web/app/globals.css b/maternal-web/app/globals.css
index eb61a79..c2f9b27 100644
--- a/maternal-web/app/globals.css
+++ b/maternal-web/app/globals.css
@@ -6,6 +6,20 @@
   --foreground-rgb: 0, 0, 0;
   --background-start-rgb: 214, 219, 220;
   --background-end-rgb: 255, 255, 255;
+
+  /* Purple/Pink Gradient Theme (Default) */
+  --color-1: #8b52ff;
+  --color-2: #d194e6;
+  --color-3: #f2a6f2;
+  --color-4: #ffb3e4;
+  --color-5: #ff7094;
+
+  /* Warm Peach Theme (High Contrast) */
+  --warm-1: #FFB6C1;
+  --warm-2: #FFDAB9;
+  --warm-3: #FFE4E1;
+  --warm-4: #FFD4CC;
+  --warm-5: #FF8B7D;
 }
 
 @media (prefers-color-scheme: dark) {
diff --git a/maternal-web/app/settings/page.tsx b/maternal-web/app/settings/page.tsx
index 6c5081b..7d7afd2 100644
--- a/maternal-web/app/settings/page.tsx
+++ b/maternal-web/app/settings/page.tsx
@@ -20,10 +20,12 @@ import { TimeFormatSelector } from '@/components/settings/TimeFormatSelector';
 import { PhotoUpload } from '@/components/common/PhotoUpload';
 import { motion } from 'framer-motion';
 import { useTranslation } from '@/hooks/useTranslation';
+import { useThemeContext } from '@/contexts/ThemeContext';
 
 export default function SettingsPage() {
   const { t } = useTranslation('settings');
   const { user, logout, refreshUser } = useAuth();
+  const { themeMode, setThemeMode } = useThemeContext();
   const [name, setName] = useState(user?.name || '');
   const [photoUrl, setPhotoUrl] = useState(user?.photoUrl || '');
   const [timezone, setTimezone] = useState(user?.timezone || 'UTC');
@@ -194,6 +196,25 @@ export default function SettingsPage() {
               <TimeZoneSelector value={timezone} onChange={setTimezone} />
               <Divider />
               <TimeFormatSelector value={timeFormat} onChange={setTimeFormat} />
+              <Divider />
+              <Box>
+                <Typography variant="subtitle1" fontWeight="600" gutterBottom>
+                  Theme Mode
+                </Typography>
+                <Typography variant="body2" color="text.secondary" gutterBottom>
+                  High Contrast mode uses larger text and stronger colors for better readability
+                </Typography>
+                <FormControlLabel
+                  control={
+                    <Switch
+                      checked={themeMode === 'highContrast'}
+                      onChange={(e) => setThemeMode(e.target.checked ? 'highContrast' : 'standard')}
+                      disabled={isLoading}
+                    />
+                  }
+                  label={themeMode === 'highContrast' ? 'High Contrast Mode' : 'Standard Mode'}
+                />
+              </Box>
             </Box>
           </CardContent>
         </Card>
diff --git a/maternal-web/components/ThemeRegistry.tsx b/maternal-web/components/ThemeRegistry.tsx
index 6f52701..9777fc1 100644
--- a/maternal-web/components/ThemeRegistry.tsx
+++ b/maternal-web/components/ThemeRegistry.tsx
@@ -3,19 +3,31 @@
 import { ThemeProvider } from '@mui/material/styles';
 import CssBaseline from '@mui/material/CssBaseline';
 import { AppRouterCacheProvider } from '@mui/material-nextjs/v14-appRouter';
-import { maternalTheme } from '@/styles/themes/maternalTheme';
 import { AuthProvider } from '@/lib/auth/AuthContext';
+import { ThemeContextProvider, useThemeContext } from '@/contexts/ThemeContext';
 import { ReactNode } from 'react';
 
+function ThemeProviderWrapper({ children }: { children: ReactNode }) {
+  const { currentTheme } = useThemeContext();
+
+  return (
+    <ThemeProvider theme={currentTheme}>
+      <CssBaseline />
+      <AuthProvider>
+        {children}
+      </AuthProvider>
+    </ThemeProvider>
+  );
+}
+
 export function ThemeRegistry({ children }: { children: ReactNode }) {
   return (
     <AppRouterCacheProvider>
-      <ThemeProvider theme={maternalTheme}>
-        <CssBaseline />
-        <AuthProvider>
+      <ThemeContextProvider>
+        <ThemeProviderWrapper>
           {children}
-        </AuthProvider>
-      </ThemeProvider>
+        </ThemeProviderWrapper>
+      </ThemeContextProvider>
     </AppRouterCacheProvider>
   );
 }
diff --git a/maternal-web/contexts/ThemeContext.tsx b/maternal-web/contexts/ThemeContext.tsx
new file mode 100644
index 0000000..84d2a43
--- /dev/null
+++ b/maternal-web/contexts/ThemeContext.tsx
@@ -0,0 +1,65 @@
+'use client';
+
+import { createContext, useContext, useState, useEffect, ReactNode } from 'react';
+import { Theme } from '@mui/material/styles';
+import { purpleTheme } from '@/styles/themes/purpleTheme';
+import { highContrastTheme } from '@/styles/themes/highContrastTheme';
+
+export type ThemeMode = 'standard' | 'highContrast';
+
+interface ThemeContextType {
+  themeMode: ThemeMode;
+  toggleTheme: () => void;
+  setThemeMode: (mode: ThemeMode) => void;
+  currentTheme: Theme;
+}
+
+const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
+
+const THEME_STORAGE_KEY = 'maternal_theme_preference';
+
+export function ThemeContextProvider({ children }: { children: ReactNode }) {
+  const [themeMode, setThemeModeState] = useState<ThemeMode>('standard');
+  const [mounted, setMounted] = useState(false);
+
+  // Load theme preference from localStorage on mount
+  useEffect(() => {
+    const savedTheme = localStorage.getItem(THEME_STORAGE_KEY) as ThemeMode | null;
+    if (savedTheme === 'highContrast' || savedTheme === 'standard') {
+      setThemeModeState(savedTheme);
+    }
+    setMounted(true);
+  }, []);
+
+  // Save theme preference to localStorage when it changes
+  const setThemeMode = (mode: ThemeMode) => {
+    setThemeModeState(mode);
+    localStorage.setItem(THEME_STORAGE_KEY, mode);
+  };
+
+  const toggleTheme = () => {
+    const newMode = themeMode === 'standard' ? 'highContrast' : 'standard';
+    setThemeMode(newMode);
+  };
+
+  const currentTheme = themeMode === 'highContrast' ? highContrastTheme : purpleTheme;
+
+  // Prevent flash of wrong theme
+  if (!mounted) {
+    return null;
+  }
+
+  return (
+    <ThemeContext.Provider value={{ themeMode, toggleTheme, setThemeMode, currentTheme }}>
+      {children}
+    </ThemeContext.Provider>
+  );
+}
+
+export function useThemeContext() {
+  const context = useContext(ThemeContext);
+  if (context === undefined) {
+    throw new Error('useThemeContext must be used within a ThemeContextProvider');
+  }
+  return context;
+}
diff --git a/maternal-web/public/sw.js b/maternal-web/public/sw.js
index 3876fd0..8fab338 100644
--- a/maternal-web/public/sw.js
+++ b/maternal-web/public/sw.js
@@ -1 +1 @@
-if(!self.define){let e,a={};const s=(s,c)=>(s=new URL(s+".js",c).href,a[s]||new Promise(a=>{if("document"in self){const e=document.createElement("script");e.src=s,e.onload=a,document.head.appendChild(e)}else e=s,importScripts(s),a()}).then(()=>{let e=a[s];if(!e)throw new Error(`Module ${s} didn’t register its module`);return e}));self.define=(c,i)=>{const n=e||("document"in self?document.currentScript.src:"")||location.href;if(a[n])return;let t={};const r=e=>s(e,n),f={module:{uri:n},exports:t,require:r};a[n]=Promise.all(c.map(e=>f[e]||r(e))).then(e=>(i(...e),t))}}define(["./workbox-4d767a27"],function(e){"use strict";importScripts(),self.skipWaiting(),e.clientsClaim(),e.precacheAndRoute([{url:"/_next/app-build-manifest.json",revision:"2c9771198b1999a5dbe37f3effc5fbde"},{url:"/_next/static/chunks/101-3dd0627909cd6c22.js",revision:"3dd0627909cd6c22"},{url:"/_next/static/chunks/1213-7820689c8a23df1d.js",revision:"7820689c8a23df1d"},{url:"/_next/static/chunks/1233-aa8672e107c5a9d6.js",revision:"aa8672e107c5a9d6"},{url:"/_next/static/chunks/1255-b2f7fd83e387a9e1.js",revision:"b2f7fd83e387a9e1"},{url:"/_next/static/chunks/1280-6ed1b9adf09ef408.js",revision:"6ed1b9adf09ef408"},{url:"/_next/static/chunks/1543-530e0f57f7af68aa.js",revision:"530e0f57f7af68aa"},{url:"/_next/static/chunks/1863-7231108310f72246.js",revision:"7231108310f72246"},{url:"/_next/static/chunks/2262-26293d6453fcc927.js",revision:"26293d6453fcc927"},{url:"/_next/static/chunks/2349-f488a1827d114358.js",revision:"f488a1827d114358"},{url:"/_next/static/chunks/2449-b8a41aa6a7d2d3a4.js",revision:"b8a41aa6a7d2d3a4"},{url:"/_next/static/chunks/2619-04bc32f026a0d946.js",revision:"04bc32f026a0d946"},{url:"/_next/static/chunks/2693-b5dbccaf1ce00a0b.js",revision:"b5dbccaf1ce00a0b"},{url:"/_next/static/chunks/3039-0e9bf08230c8ee7b.js",revision:"0e9bf08230c8ee7b"},{url:"/_next/static/chunks/3505-dc772ce29ac0b276.js",revision:"dc772ce29ac0b276"},{url:"/_next/static/chunks/3762-9e7418e6773035f2.js",revision:"9e7418e6773035f2"},{url:"/_next/static/chunks/3782-ec9e7e72c6eacec1.js",revision:"ec9e7e72c6eacec1"},{url:"/_next/static/chunks/3823-7d22f3a064856b06.js",revision:"7d22f3a064856b06"},{url:"/_next/static/chunks/4546-3be482382b443121.js",revision:"3be482382b443121"},{url:"/_next/static/chunks/4bd1b696-100b9d70ed4e49c1.js",revision:"100b9d70ed4e49c1"},{url:"/_next/static/chunks/5125-c990fc036d2a6ce4.js",revision:"c990fc036d2a6ce4"},{url:"/_next/static/chunks/5380-9004e1ac3565daca.js",revision:"9004e1ac3565daca"},{url:"/_next/static/chunks/5385-7ecda8e4ba984edc.js",revision:"7ecda8e4ba984edc"},{url:"/_next/static/chunks/5482-7535aa0aab02d518.js",revision:"7535aa0aab02d518"},{url:"/_next/static/chunks/5491-75a34ac5f4b1bc71.js",revision:"75a34ac5f4b1bc71"},{url:"/_next/static/chunks/5786-300f6f4e5c444b8e.js",revision:"300f6f4e5c444b8e"},{url:"/_next/static/chunks/6088-c165c565edce02be.js",revision:"c165c565edce02be"},{url:"/_next/static/chunks/6107-8fb7b82c50ce5ddd.js",revision:"8fb7b82c50ce5ddd"},{url:"/_next/static/chunks/6191.e178f0fbe1b1be57.js",revision:"e178f0fbe1b1be57"},{url:"/_next/static/chunks/670-a4ca0f366ee779f5.js",revision:"a4ca0f366ee779f5"},{url:"/_next/static/chunks/6847-ce99bc721adda9c4.js",revision:"ce99bc721adda9c4"},{url:"/_next/static/chunks/6873-ff265086321345c8.js",revision:"ff265086321345c8"},{url:"/_next/static/chunks/6886-40f1779ffff00d58.js",revision:"40f1779ffff00d58"},{url:"/_next/static/chunks/6937.f8d44316fed7bc8e.js",revision:"f8d44316fed7bc8e"},{url:"/_next/static/chunks/710-7e96cbf5d461482a.js",revision:"7e96cbf5d461482a"},{url:"/_next/static/chunks/7359-1abfb9f346309354.js",revision:"1abfb9f346309354"},{url:"/_next/static/chunks/7741-0af8b5a61d8e63d3.js",revision:"0af8b5a61d8e63d3"},{url:"/_next/static/chunks/7855-72c79224370eff7b.js",revision:"72c79224370eff7b"},{url:"/_next/static/chunks/787-032067ae978e62a8.js",revision:"032067ae978e62a8"},{url:"/_next/static/chunks/8126-48064e6c5d5794c7.js",revision:"48064e6c5d5794c7"},{url:"/_next/static/chunks/8241-eaf1b9c6054e9ad8.js",revision:"eaf1b9c6054e9ad8"},{url:"/_next/static/chunks/8466-ffa71cea7998f777.js",revision:"ffa71cea7998f777"},{url:"/_next/static/chunks/8544.74f59dd908783038.js",revision:"74f59dd908783038"},{url:"/_next/static/chunks/8746-92ff3ad56eb06d6e.js",revision:"92ff3ad56eb06d6e"},{url:"/_next/static/chunks/8876-26dea77829b2c9a0.js",revision:"26dea77829b2c9a0"},{url:"/_next/static/chunks/9205-f540995b767df00b.js",revision:"f540995b767df00b"},{url:"/_next/static/chunks/9241-01664d98236f70ec.js",revision:"01664d98236f70ec"},{url:"/_next/static/chunks/9333-17f3dbe8f3dcc2d0.js",revision:"17f3dbe8f3dcc2d0"},{url:"/_next/static/chunks/9378-4fb7500ab3ba2b2b.js",revision:"4fb7500ab3ba2b2b"},{url:"/_next/static/chunks/9392-2887c5e5703ed90a.js",revision:"2887c5e5703ed90a"},{url:"/_next/static/chunks/9397-40b8ac68e22a4d87.js",revision:"40b8ac68e22a4d87"},{url:"/_next/static/chunks/9515-53e74005e71810bd.js",revision:"53e74005e71810bd"},{url:"/_next/static/chunks/9958.804e47ffb4b9facb.js",revision:"804e47ffb4b9facb"},{url:"/_next/static/chunks/app/(auth)/forgot-password/page-f3956296e0f418de.js",revision:"f3956296e0f418de"},{url:"/_next/static/chunks/app/(auth)/login/page-c290f009a57a0d9a.js",revision:"c290f009a57a0d9a"},{url:"/_next/static/chunks/app/(auth)/onboarding/page-066f1de6cbae435f.js",revision:"066f1de6cbae435f"},{url:"/_next/static/chunks/app/(auth)/register/page-99d79df8d3fb5906.js",revision:"99d79df8d3fb5906"},{url:"/_next/static/chunks/app/(auth)/reset-password/page-f08b56ee59c00023.js",revision:"f08b56ee59c00023"},{url:"/_next/static/chunks/app/_not-found/page-95f1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diff --git a/maternal-web/styles/themes/highContrastTheme.ts b/maternal-web/styles/themes/highContrastTheme.ts
new file mode 100644
index 0000000..ce4be44
--- /dev/null
+++ b/maternal-web/styles/themes/highContrastTheme.ts
@@ -0,0 +1,127 @@
+'use client';
+
+import { createTheme } from '@mui/material/styles';
+
+// High Contrast Warm Peach theme - Original theme, now accessibility option
+export const highContrastTheme = createTheme({
+  palette: {
+    primary: {
+      main: '#FFB6C1', // Light pink/rose
+      light: '#FFE4E1', // Misty rose
+      dark: '#DB7093', // Pale violet red
+    },
+    secondary: {
+      main: '#FFDAB9', // Peach puff
+      light: '#FFE5CC',
+      dark: '#FFB347', // Deep peach
+    },
+    background: {
+      default: '#FFF9F5', // Warm white
+      paper: '#FFFFFF',
+    },
+    text: {
+      primary: '#2D3748', // Dark gray - 4.5:1+ contrast
+      secondary: '#4A5568', // Darker gray for better contrast (7:1+ on white)
+    },
+  },
+  typography: {
+    fontFamily: '"Inter", "Roboto", "Helvetica", "Arial", sans-serif',
+    h1: {
+      fontSize: '2.15rem', // 7.5% larger for accessibility
+      fontWeight: 600,
+    },
+    h2: {
+      fontSize: '1.88rem',
+      fontWeight: 600,
+    },
+    h3: {
+      fontSize: '1.61rem',
+      fontWeight: 600,
+    },
+    h4: {
+      fontSize: '1.34rem',
+      fontWeight: 600,
+    },
+    h5: {
+      fontSize: '1.21rem',
+      fontWeight: 600,
+    },
+    h6: {
+      fontSize: '1.07rem',
+      fontWeight: 600,
+    },
+    body1: {
+      fontSize: '1.07rem', // Slightly larger for readability
+    },
+    body2: {
+      fontSize: '0.94rem',
+    },
+  },
+  shape: {
+    borderRadius: 16,
+  },
+  components: {
+    MuiButton: {
+      styleOverrides: {
+        root: {
+          borderRadius: 24,
+          textTransform: 'none',
+          minHeight: 48, // Touch target size
+          fontSize: '1.07rem', // Larger text
+          fontWeight: 600, // Bolder text for high contrast
+          paddingLeft: 24,
+          paddingRight: 24,
+        },
+        sizeLarge: {
+          minHeight: 56,
+          fontSize: '1.21rem',
+        },
+      },
+    },
+    MuiTextField: {
+      styleOverrides: {
+        root: {
+          '& .MuiInputBase-root': {
+            minHeight: 48,
+            borderRadius: 16,
+          },
+          '& .MuiInputBase-input': {
+            fontSize: '1.07rem', // Larger input text
+          },
+        },
+      },
+    },
+    MuiCard: {
+      styleOverrides: {
+        root: {
+          borderRadius: 20,
+          boxShadow: '0 4px 20px rgba(0, 0, 0, 0.12)', // Stronger shadow for contrast
+        },
+      },
+    },
+    MuiPaper: {
+      styleOverrides: {
+        root: {
+          borderRadius: 16,
+        },
+        elevation1: {
+          boxShadow: '0 2px 10px rgba(0, 0, 0, 0.1)',
+        },
+        elevation2: {
+          boxShadow: '0 4px 20px rgba(0, 0, 0, 0.12)',
+        },
+        elevation3: {
+          boxShadow: '0 6px 30px rgba(0, 0, 0, 0.15)',
+        },
+      },
+    },
+    MuiChip: {
+      styleOverrides: {
+        root: {
+          borderRadius: 12,
+          fontWeight: 600, // Bolder for high contrast
+        },
+      },
+    },
+  },
+});
diff --git a/maternal-web/styles/themes/purpleTheme.ts b/maternal-web/styles/themes/purpleTheme.ts
new file mode 100644
index 0000000..e5926ec
--- /dev/null
+++ b/maternal-web/styles/themes/purpleTheme.ts
@@ -0,0 +1,144 @@
+'use client';
+
+import { createTheme } from '@mui/material/styles';
+
+// Purple/Pink gradient theme - New default theme
+export const purpleTheme = createTheme({
+  palette: {
+    primary: {
+      main: '#8b52ff', // Vibrant purple
+      light: '#d194e6', // Light purple
+      dark: '#6b3cc9', // Dark purple
+    },
+    secondary: {
+      main: '#ff7094', // Pink
+      light: '#ffb3e4', // Light pink
+      dark: '#e6537a', // Dark pink
+    },
+    background: {
+      default: '#faf8ff', // Very light purple tint
+      paper: '#ffffff',
+    },
+    text: {
+      primary: '#2D3748', // Dark gray - 4.5:1+ contrast
+      secondary: '#4A5568', // Darker gray for better contrast
+    },
+    success: {
+      main: '#10b981',
+      light: '#6ee7b7',
+      dark: '#047857',
+    },
+    warning: {
+      main: '#f59e0b',
+      light: '#fbbf24',
+      dark: '#d97706',
+    },
+    error: {
+      main: '#ef4444',
+      light: '#fca5a5',
+      dark: '#dc2626',
+    },
+    info: {
+      main: '#3b82f6',
+      light: '#93c5fd',
+      dark: '#2563eb',
+    },
+  },
+  typography: {
+    fontFamily: '"Inter", "Roboto", "Helvetica", "Arial", sans-serif',
+    h1: {
+      fontSize: '2rem',
+      fontWeight: 600,
+    },
+    h2: {
+      fontSize: '1.75rem',
+      fontWeight: 600,
+    },
+    h3: {
+      fontSize: '1.5rem',
+      fontWeight: 600,
+    },
+    h4: {
+      fontSize: '1.25rem',
+      fontWeight: 600,
+    },
+    h5: {
+      fontSize: '1.125rem',
+      fontWeight: 600,
+    },
+    h6: {
+      fontSize: '1rem',
+      fontWeight: 600,
+    },
+    body1: {
+      fontSize: '1rem',
+    },
+    body2: {
+      fontSize: '0.875rem',
+    },
+  },
+  shape: {
+    borderRadius: 16,
+  },
+  components: {
+    MuiButton: {
+      styleOverrides: {
+        root: {
+          borderRadius: 24,
+          textTransform: 'none',
+          minHeight: 48, // Touch target size
+          fontSize: '1rem',
+          fontWeight: 500,
+          paddingLeft: 24,
+          paddingRight: 24,
+        },
+        sizeLarge: {
+          minHeight: 56,
+          fontSize: '1.125rem',
+        },
+      },
+    },
+    MuiTextField: {
+      styleOverrides: {
+        root: {
+          '& .MuiInputBase-root': {
+            minHeight: 48,
+            borderRadius: 16,
+          },
+        },
+      },
+    },
+    MuiCard: {
+      styleOverrides: {
+        root: {
+          borderRadius: 20,
+          boxShadow: '0 4px 20px rgba(0, 0, 0, 0.08)',
+        },
+      },
+    },
+    MuiPaper: {
+      styleOverrides: {
+        root: {
+          borderRadius: 16,
+        },
+        elevation1: {
+          boxShadow: '0 2px 10px rgba(0, 0, 0, 0.06)',
+        },
+        elevation2: {
+          boxShadow: '0 4px 20px rgba(0, 0, 0, 0.08)',
+        },
+        elevation3: {
+          boxShadow: '0 6px 30px rgba(0, 0, 0, 0.1)',
+        },
+      },
+    },
+    MuiChip: {
+      styleOverrides: {
+        root: {
+          borderRadius: 12,
+          fontWeight: 500,
+        },
+      },
+    },
+  },
+});