diff --git a/src/i18n/en.json b/src/i18n/en.json
index a6d6b24..3e40111 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -17,6 +17,7 @@
     "switchToLight": "Switch to light mode",
     "theme": {
       "amber": "Amber",
+      "default": "Default",
       "forest": "Forest",
       "ocean": "Ocean",
       "rose": "Rose",
diff --git a/src/index.css b/src/index.css
index a9ce6ab..49a91d7 100644
--- a/src/index.css
+++ b/src/index.css
@@ -100,11 +100,56 @@
 
 /* Color themes. Each theme re-hues the neutral tokens at the same lightness
    and chroma as the default palette (contrast is preserved) and replaces
-   primary/ring with the theme color. The default "Stalwart" theme is the
+   primary/ring with the theme color. The neutral "Default" theme is the
    bare :root/.dark above and needs no data-theme attribute. Dark theme
    blocks must stay after their light counterpart: both selectors have the
    same specificity, so source order decides. */
 
+/* "Stalwart" theme: matches the brand colors from stalw.art's own site
+   (src/styles/tokens.css there) — brand red #db2d54/#ff4570 converted to
+   oklch, neutrals kept close to true gray (unlike the other theme
+   presets below, which lightly re-hue their neutrals) since that's what
+   the real site does: saturated color only on the accent, not the
+   backdrop. */
+:root[data-theme='stalwart'] {
+  --foreground: oklch(0.147 0.009 285.3);
+  --content-background: oklch(0.974 0.003 286.4);
+  --primary: oklch(0.586 0.207 14.6);
+  --primary-foreground: oklch(0.985 0.002 285.3);
+  --secondary: oklch(0.965 0.005 285.3);
+  --secondary-foreground: oklch(0.205 0.017 285.3);
+  --muted: oklch(0.93 0.005 285.3);
+  --muted-foreground: oklch(0.431 0.016 285.7);
+  --accent: oklch(0.965 0.005 285.3);
+  --accent-foreground: oklch(0.205 0.017 285.3);
+  --border: oklch(0.926 0.005 286.3);
+  --input: oklch(0.926 0.005 286.3);
+  --ring: oklch(0.586 0.207 14.6);
+  --chart-1: 350 65% 52%;
+}
+
+.dark[data-theme='stalwart'] {
+  --background: oklch(0.136 0.007 285.5);
+  --foreground: oklch(0.968 0.003 286.4);
+  --card: oklch(0.19 0.012 285.2);
+  --card-foreground: oklch(0.968 0.003 286.4);
+  --popover: oklch(0.221 0.016 285.1);
+  --popover-foreground: oklch(0.968 0.003 286.4);
+  --content-background: oklch(0.11 0.006 285.5);
+  --primary: oklch(0.672 0.221 12.3);
+  --primary-foreground: oklch(0.15 0.03 14.6);
+  --secondary: oklch(0.256 0.019 285);
+  --secondary-foreground: oklch(0.968 0.003 286.4);
+  --muted: oklch(0.256 0.019 285);
+  --muted-foreground: oklch(0.719 0.014 286);
+  --accent: oklch(0.28 0.02 285.1);
+  --accent-foreground: oklch(0.968 0.003 286.4);
+  --border: oklch(0.272 0.017 285.2);
+  --input: oklch(0.272 0.017 285.2);
+  --ring: oklch(0.672 0.221 12.3);
+  --chart-1: 350 80% 65%;
+}
+
 :root[data-theme='ocean'] {
   --foreground: oklch(0.145 0.02 264);
   --content-background: oklch(0.965 0.008 264);
diff --git a/src/stores/uiStore.ts b/src/stores/uiStore.ts
index fa621bd..3705103 100644
--- a/src/stores/uiStore.ts
+++ b/src/stores/uiStore.ts
@@ -8,7 +8,7 @@ import { create } from 'zustand';
 import { persist } from 'zustand/middleware';
 
 export type Theme = 'light' | 'dark';
-export type ColorTheme = 'stalwart' | 'ocean' | 'forest' | 'violet' | 'rose' | 'amber' | 'teal';
+export type ColorTheme = 'default' | 'stalwart' | 'ocean' | 'forest' | 'violet' | 'rose' | 'amber' | 'teal';
 export type Radius = 'rounded' | 'square';
 
 interface UIState {
@@ -35,8 +35,8 @@ function applyThemeClass(theme: Theme) {
 }
 
 function applyColorThemeAttribute(colorTheme: ColorTheme) {
-  // The default theme is defined directly on :root/.dark, so it needs no attribute.
-  if (colorTheme === 'stalwart') {
+  // The neutral "Default" theme is defined directly on :root/.dark, so it needs no attribute.
+  if (colorTheme === 'default') {
     document.documentElement.removeAttribute('data-theme');
   } else {
     document.documentElement.dataset.theme = colorTheme;
@@ -48,11 +48,17 @@ function applyRadiusAttribute(radius: Radius) {
 }
 
 export const COLOR_THEMES: { value: ColorTheme; labelKey: string; fallback: string; swatch: string }[] = [
+  {
+    value: 'default',
+    labelKey: 'appearance.theme.default',
+    fallback: 'Default',
+    swatch: 'linear-gradient(135deg, oklch(0.205 0.017 285.823) 50%, oklch(0.92 0.007 285.823) 50%)',
+  },
   {
     value: 'stalwart',
     labelKey: 'appearance.theme.stalwart',
     fallback: 'Stalwart',
-    swatch: 'linear-gradient(135deg, oklch(0.205 0.017 285.823) 50%, oklch(0.92 0.007 285.823) 50%)',
+    swatch: 'oklch(0.586 0.207 14.6)',
   },
   { value: 'ocean', labelKey: 'appearance.theme.ocean', fallback: 'Ocean', swatch: 'oklch(0.546 0.215 262.9)' },
   { value: 'forest', labelKey: 'appearance.theme.forest', fallback: 'Forest', swatch: 'oklch(0.527 0.137 150.1)' },