diff --git a/src/themes/parchment.js b/src/themes/parchment.js
new file mode 100644
index 0000000..03bc22d
--- /dev/null
+++ b/src/themes/parchment.js
@@ -0,0 +1,374 @@
+/**
+ * Parchment Theme for Navi
+ *
+ * Medieval manuscript cartography. An ancient vellum map unrolled on a table —
+ * deep rich ultramarine water (not modern pale blue), warm aged parchment land,
+ * dark sepia ink labels, burnt sienna roads. Forests are olive-gold tints, not
+ * modern green. The feel of a map you'd find in a monastery scriptorium or a
+ * leather-bound explorer's journal.
+ *
+ * CUSTOM FONT: IM Fell English — a revival of a 1672 Fell typeface.
+ * Irregular, warm, distinctly pre-modern. Used for ALL text.
+ *
+ * Parchment rules:
+ * - Water is DEEP ultramarine (#1a3a6a), not modern pale blue
+ * - Land is warm parchment/vellum — aged, not white
+ * - Vegetation is olive-gold, NOT modern green
+ * - Roads are brown ink — darker = more important
+ * - Labels are dark sepia ink with parchment halos
+ * - Everything should feel handmade, warm, aged
+ */
+
+/**
+ * Map flavor colors - protomaps-themes-base schema
+ * All 73 flat keys + pois + landcover nested objects
+ */
+const parchmentColors = {
+  // Background & earth - warm parchment
+  background: "#c8b888",
+  earth: "#d8c8a0",
+
+  // Land use areas - warm parchment variations
+  park_a: "#c8c088",
+  park_b: "#b8b078",
+  hospital: "#d8c8a0",
+  industrial: "#c8b890",
+  school: "#d0c098",
+  wood_a: "#a8a060",
+  wood_b: "#8a8848",
+  pedestrian: "#d0c098",
+  scrub_a: "#b8b070",
+  scrub_b: "#a8a060",
+  glacier: "#e0d8c0",
+  sand: "#d8c8a0",
+  beach: "#e0d0a8",
+  aerodrome: "#c8c0a0",
+  runway: "#b8a888",
+  water: "#1a3a6a",
+  zoo: "#c0b880",
+  military: "#c8b898",
+
+  // Tunnels - parchment casings
+  tunnel_other_casing: "#b8a070",
+  tunnel_minor_casing: "#b8a070",
+  tunnel_link_casing: "#b8a070",
+  tunnel_major_casing: "#b8a070",
+  tunnel_highway_casing: "#b8a070",
+  tunnel_other: "#c8b898",
+  tunnel_minor: "#c8b898",
+  tunnel_link: "#b8a078",
+  tunnel_major: "#a89068",
+  tunnel_highway: "#988058",
+
+  // Pier & buildings - warm stone
+  pier: "#c0a878",
+  buildings: "#c0a878",
+
+  // Roads & casings - brown ink progression
+  minor_service_casing: "#b8a070",
+  minor_casing: "#b8a070",
+  link_casing: "#b8a070",
+  major_casing_late: "#b8a070",
+  highway_casing_late: "#b8a070",
+  other: "#a89068",
+  minor_service: "#a89068",
+  minor_a: "#9a8058",
+  minor_b: "#a89068",
+  link: "#8a6a3a",
+  major_casing_early: "#b8a070",
+  major: "#7a5a2a",
+  highway_casing_early: "#b8a070",
+  highway: "#6a3a1a",
+  railway: "#8a7050",
+  boundaries: "#8a6a3a",
+
+  // Waterway label - parchment on dark water
+  waterway_label: "#c8b890",
+
+  // Bridges - same brown ink colors
+  bridges_other_casing: "#c0a880",
+  bridges_minor_casing: "#b8a070",
+  bridges_link_casing: "#b8a070",
+  bridges_major_casing: "#b8a070",
+  bridges_highway_casing: "#b8a070",
+  bridges_other: "#a89068",
+  bridges_minor: "#9a8058",
+  bridges_link: "#8a6a3a",
+  bridges_major: "#7a5a2a",
+  bridges_highway: "#6a3a1a",
+
+  // Labels - dark sepia ink with PARCHMENT halos
+  roads_label_minor: "#6a4a20",
+  roads_label_minor_halo: "#d8c8a0",
+  roads_label_major: "#5a3a10",
+  roads_label_major_halo: "#d8c8a0",
+  ocean_label: "#c8b890",
+  peak_label: "#5a4020",
+  subplace_label: "#6a4a20",
+  subplace_label_halo: "#d8c8a0",
+  city_label: "#2a1a0a",
+  city_label_halo: "#d8c8a0",
+  state_label: "#8a7050",
+  state_label_halo: "#d8c8a0",
+  country_label: "#5a4020",
+  address_label: "#6a4a20",
+  address_label_halo: "#d8c8a0",
+
+  // POI icon colors - period-appropriate muted palette
+  pois: {
+    blue: "#1a3a6a",
+    green: "#4a6830",
+    lapis: "#2a4a7a",
+    pink: "#8a5040",
+    red: "#8b2500",
+    slategray: "#6a5a4a",
+    tangerine: "#8b4513",
+    turquoise: "#3a5a6a",
+  },
+
+  // Landcover fill colors - olive-gold tints, NOT modern green
+  landcover: {
+    grassland: "rgba(184, 176, 120, 1)",
+    barren: "rgba(200, 184, 136, 1)",
+    urban_area: "rgba(208, 192, 152, 1)",
+    farmland: "rgba(200, 184, 128, 1)",
+    glacier: "rgba(224, 216, 192, 1)",
+    scrub: "rgba(176, 168, 112, 1)",
+    forest: "rgba(138, 136, 72, 1)",
+  },
+}
+
+/**
+ * UI CSS custom properties - medieval manuscript aesthetic
+ * Warm parchment panels with dark sepia ink text
+ */
+const parchmentUI = {
+  // Fonts - IM Fell English for everything
+  "--font-sans": "'IM Fell English', serif",
+  "--font-mono": "'IM Fell English', serif",
+  "--font-heading": "'IM Fell English', serif",
+  // Backgrounds - warm parchment
+  "--bg-base": "#d8c8a0",
+  "--bg-raised": "#e4d8b8",
+  "--bg-overlay": "#ddd0a8",
+  "--bg-input": "#e8dcc0",
+  "--bg-inset": "#d0c090",
+  "--bg-muted": "#e0d4b0",
+  // Text - dark sepia ink
+  "--text-primary": "#2a1a0a",
+  "--text-secondary": "#5a4020",
+  "--text-tertiary": "#8a7050",
+  "--text-inverse": "#e8d8b8",
+  // Borders - aged paper edge
+  "--border": "#b8a070",
+  "--border-subtle": "#c8b890",
+  // Accent - saddle brown
+  "--accent": "#8b4513",
+  "--accent-hover": "#a05520",
+  "--accent-muted": "#e0d0b0",
+  // Tan - brown ink variants
+  "--tan": "#7a5a2a",
+  "--tan-muted": "#e8d8c0",
+  // Pins - brown ink and ultramarine
+  "--pin-origin": "#8b4513",
+  "--pin-destination": "#1a3a6a",
+  "--pin-intermediate": "#6a5a40",
+  "--pin-stroke": "#2a1a0a",
+  // Status - period-appropriate colors
+  "--status-success": "#4a6830",
+  "--status-warning": "#b8860b",
+  "--status-danger": "#8b2500",
+  "--success": "#4a6830",
+  "--warning": "#b8860b",
+  "--warning-muted": "#e8d8b8",
+  // Route - saddle brown
+  "--route-line": "#8b4513",
+  // Shadows - warm brown tinted, subtle
+  "--shadow": "0 2px 8px rgba(42, 26, 10, 0.15)",
+  "--shadow-lg": "0 4px 16px rgba(42, 26, 10, 0.20)",
+}
+
+/**
+ * Overlay configuration - warm brown ink on parchment
+ */
+const parchmentOverlay = {
+  // Hillshade - warm dramatic terrain
+  hillshade: {
+    exaggeration: 0.6,
+    illuminationDirection: 315,
+    shadowColor: "#3a2a1a",
+    highlightColor: "#f0e8d8",
+  },
+
+  // Contours - brown ink elevation lines
+  contours: {
+    opacityMod: 1.0,
+    minorColor: "#a88060",
+    minorOpacity: 0.5,
+    minorWidth: { z11: 0.5, z14: 1.0 },
+    intermediateColor: "#8a6a3a",
+    intermediateOpacity: 0.7,
+    intermediateWidth: { z8: 0.8, z14: 1.2 },
+    indexColor: "#6a4a20",
+    indexOpacity: 0.9,
+    indexWidth: { z4: 1.2, z14: 1.8 },
+    labelColor: "#5a3a10",
+    labelHaloColor: "#d8c8a0",
+    labelHaloWidth: 1.5,
+    labelOpacity: 0.85,
+    labelSize: 10,
+    labelFont: ["Noto Sans Regular"],
+  },
+
+  // Contours Test - same warm brown
+  contoursTest: {
+    minorColor: "#a88060",
+    intermediateColor: "#8a6a3a",
+    indexColor: "#6a4a20",
+    labelColor: "#5a3a10",
+  },
+
+  // Contours Test 10ft - slightly lighter brown
+  contoursTest10ft: {
+    minorColor: "#b89070",
+    intermediateColor: "#9a7a4a",
+    indexColor: "#7a5a30",
+    labelColor: "#6a4a20",
+  },
+
+  // Public Lands - muted olive-gold fills
+  publicLands: {
+    opacityMod: 0.8,
+    // Fill colors - olive-gold tints
+    fillWA: "#b8b070",
+    fillNPS: "#a8a060",
+    fillUSFS: "#b0a868",
+    fillBLM: "#c0b080",
+    fillFWS: "#a0a058",
+    fillSTAT: "#b8b078",
+    fillLOC: "#c0b888",
+    fillDefault: "#c8c090",
+    // Fill opacities
+    fillOpacityWA: 0.25,
+    fillOpacityNPS: 0.25,
+    fillOpacityUSFS: 0.22,
+    fillOpacityBLM: 0.18,
+    fillOpacitySTAT: 0.22,
+    fillOpacityLOC: 0.18,
+    fillOpacityDefault: 0.15,
+    // Outline colors - brown ink
+    outlineWA: "#8a7040",
+    outlineNPS: "#7a6030",
+    outlineUSFS: "#8a7040",
+    outlineBLM: "#9a8050",
+    outlineFWS: "#7a6030",
+    outlineSTAT: "#8a7040",
+    outlineLOC: "#9a8050",
+    outlineDefault: "#a89060",
+    // Outline opacities
+    outlineOpacityNPS: 0.7,
+    outlineOpacityUSFS: 0.6,
+    outlineOpacityDefault: 0.5,
+    // Outline width
+    outlineWidth: { z4: 0.3, z8: 0.8, z12: 1.2 },
+    // Labels - sepia ink with parchment halo
+    labelColor: "#5a4020",
+    labelHaloColor: "#d8c8a0",
+    labelHaloWidth: 1.5,
+    labelOpacity: 0.85,
+    labelSize: { z10: 10, z14: 13 },
+    labelFont: ["Noto Sans Regular"],
+  },
+
+  // USFS Trails - brown/sienna/olive ink family
+  usfsTrails: {
+    // Roads - brown ink
+    roadsColor: "#7a5a2a",
+    roadsOpacity: 0.9,
+    roadsWidth: { z10: 1.5, z14: 2.5, z16: 3.5 },
+    // Trails - warm earth tones only
+    trailsMotorized: "#8b4513",
+    trailsBicycle: "#8a6a3a",
+    trailsHiker: "#6a5a40",
+    trailsDefault: "#7a5a2a",
+    trailsOpacity: 0.9,
+    trailsWidth: { z10: 2.0, z14: 3.0, z16: 4.0 },
+    trailsDash: [2, 1.5],
+    // Road labels
+    roadsLabelColor: "#5a4020",
+    roadsLabelHaloColor: "#d8c8a0",
+    roadsLabelHaloWidth: 1.5,
+    roadsLabelOpacity: 0.9,
+    roadsLabelSize: 11,
+    // Trail labels
+    trailsLabelColor: "#5a4020",
+    trailsLabelHaloColor: "#d8c8a0",
+    trailsLabelHaloWidth: 1.5,
+    trailsLabelOpacity: 0.9,
+    trailsLabelSize: 11,
+    labelFont: ["Noto Sans Regular"],
+    // Hit layer
+    hitWidth: 14,
+  },
+
+  // BLM Trails - brown/sienna/olive ink family
+  blmTrails: {
+    // Route colors - warm earth tones
+    color4wdHigh: "#8b4513",
+    color4wdLow: "#8a6a3a",
+    colorAtv: "#8b2500",
+    colorMotoSingle: "#7a5a2a",
+    color2wdLow: "#9a7a4a",
+    colorNonMech: "#6a5a40",
+    colorDefault: "#8a6a3a",
+    colorSnow: "#5a6a7a",
+    lineOpacity: 0.9,
+    lineOpacityOther: 0.85,
+    lineWidth: { z10: 2.0, z14: 3.0, z16: 4.0 },
+    // Dash patterns
+    dashImproved: [4, 2],
+    dashAggregate: [1, 2],
+    dashSnow: [4, 2, 1, 2],
+    dashOther: [4, 2, 1, 2, 1, 2],
+    // Labels
+    labelColor: "#5a4020",
+    labelHaloColor: "#d8c8a0",
+    labelHaloWidth: 1.5,
+    labelOpacity: 0.9,
+    labelSize: 11,
+    labelFont: ["Noto Sans Regular"],
+    // Hit layer
+    hitWidth: 14,
+  },
+}
+
+/**
+ * Satellite adjustments - warm sepia shift
+ */
+const parchmentSatellite = {
+  opacity: 0.85,
+  brightnessMin: 0.0,
+  brightnessMax: 0.85,
+  contrast: 0.15,
+  saturation: -0.4,
+  hueRotate: 30,
+}
+
+/**
+ * Parchment theme configuration
+ */
+const parchmentTheme = {
+  id: "parchment",
+  name: "Parchment",
+  dark: false,
+  swatch: ["#d8c8a0", "#8b4513", "#1a3a6a"],
+  fontImports: [
+    "https://fonts.googleapis.com/css2?family=IM+Fell+English:ital@0;1&display=swap",
+  ],
+  colors: parchmentColors,
+  satellite: parchmentSatellite,
+  overlay: parchmentOverlay,
+  ui: parchmentUI,
+}
+
+export default parchmentTheme
diff --git a/src/themes/registry.js b/src/themes/registry.js
index cdebb83..a65a490 100644
--- a/src/themes/registry.js
+++ b/src/themes/registry.js
@@ -21,6 +21,7 @@ import cyberpunkTheme from './cyberpunk.js'
 import rangerTheme from './ranger.js'
 import tacticalTheme from './tactical.js'
 import nightopsTheme from './nightops.js'
+import parchmentTheme from './parchment.js'
 
 // ═══════════════════════════════════════════════════════════════════════════
 // UI CSS CUSTOM PROPERTIES
@@ -496,6 +497,7 @@ const themes = {
   ranger: rangerTheme,
   tactical: tacticalTheme,
   nightops: nightopsTheme,
+  parchment: parchmentTheme,
   // Custom themes go here. Example:
   // 'midnight': {
   //   id: 'midnight',