diff --git a/internal/web/static/app.css b/internal/web/static/app.css
index 67d0cf8..20732be 100644
--- a/internal/web/static/app.css
+++ b/internal/web/static/app.css
@@ -40,6 +40,47 @@
   --ok: #3E6B3E; --warn: #7A5E1B; --err: #9E4054;
   --on-accent: #274a6b;
 }
+/* matching light/dark counterparts: same hue family, flipped lightness roles */
+/* Midnight Light: light counterpart of midnight (violet family) */
+[data-preset="midnight-light"] {
+  --bg: #F3EFF9; --surface: #FAF8FD; --surface-2: #E1D9EF;
+  --muted: #A99CC9; --muted-fg: #5F5390; --fg: #2B2140;
+  --accent: #7B5FC0; --border: #D8CEEC;
+  --ok: #3E6B3E; --warn: #7A5E1B; --err: #9E4054;
+  --on-accent: #FAF8FD;
+}
+/* Smooth Dark: dark counterpart of smooth (muted slate-violet family) */
+[data-preset="smooth-dark"] {
+  --bg: #23222E; --surface: #2C2B3A; --surface-2: #3B3A4D;
+  --muted: #7A7796; --muted-fg: #B5B1C9; --fg: #E8E7F0;
+  --accent: #A9A6C4; --border: #45435A;
+  --ok: #9CD49C; --warn: #E8C77B; --err: #F2A3B3;
+  --on-accent: #23222E;
+}
+/* Pastel Lavender Dark: dark counterpart (lavender family) */
+[data-preset="pastel-lavender-dark"] {
+  --bg: #2A2340; --surface: #352C50; --surface-2: #4A3E6B;
+  --muted: #8F7FB8; --muted-fg: #CBBEE8; --fg: #EFEAF8;
+  --accent: #B39DE4; --border: #4E4272;
+  --ok: #9CD49C; --warn: #E8C77B; --err: #F2A3B3;
+  --on-accent: #2A2340;
+}
+/* Pastel Peach Dark: dark counterpart (peach family) */
+[data-preset="pastel-peach-dark"] {
+  --bg: #3A241C; --surface: #4A2F24; --surface-2: #654234;
+  --muted: #B07A64; --muted-fg: #F0C4B0; --fg: #FBEBE2;
+  --accent: #F9826C; --border: #75503F;
+  --ok: #9CD49C; --warn: #E8C77B; --err: #F2A3B3;
+  --on-accent: #3A241C;
+}
+/* Pastel Cloud Dark: dark counterpart (pink cloud family, blue accent) */
+[data-preset="pastel-cloud-dark"] {
+  --bg: #33222E; --surface: #402C3A; --surface-2: #583D50;
+  --muted: #A87E97; --muted-fg: #E5C2D6; --fg: #FAEEF5;
+  --accent: #A2D2FF; --border: #644759;
+  --ok: #9CD49C; --warn: #E8C77B; --err: #F2A3B3;
+  --on-accent: #33222E;
+}
 
 * { box-sizing: border-box; margin: 0; padding: 0; }
 body {
diff --git a/internal/web/templates/settings.html b/internal/web/templates/settings.html
index b4a8629..d5a2870 100644
--- a/internal/web/templates/settings.html
+++ b/internal/web/templates/settings.html
@@ -21,7 +21,12 @@
     { id: 'smooth',          name: 'Smooth' },
     { id: 'pastel-lavender', name: 'Pastel Lavender' },
     { id: 'pastel-peach',    name: 'Pastel Peach' },
-    { id: 'pastel-cloud',    name: 'Pastel Cloud' }
+    { id: 'pastel-cloud',    name: 'Pastel Cloud' },
+    { id: 'midnight-light',       name: 'Midnight Light' },
+    { id: 'smooth-dark',          name: 'Smooth Dark' },
+    { id: 'pastel-lavender-dark', name: 'Pastel Lavender Dark' },
+    { id: 'pastel-peach-dark',    name: 'Pastel Peach Dark' },
+    { id: 'pastel-cloud-dark',    name: 'Pastel Cloud Dark' }
   ];
   var SWATCH_VARS = ['--bg', '--surface', '--surface-2', '--muted', '--accent'];