The board's symbol takes a tint — a 4×2 colour row under the picker's glyphs, and the glyph itself moves into the titlebar

iconColor stops being hand-written-only (user-ruled, superseding 03's
"schema yes, control no"): it rides StyleCommand.apply → applyStyle as
the third styled dimension — per-dimension no-op skip, one bracket, one
history step, ExpectedField.iconColor for staleness. The SymbolPicker
grows an opt-in colour row (leading None plus seven Palette.foregrounds
hues, None removes the key); the board popover is its one caller. The
window-title widget now draws the board's resolved glyph in that tint
beside the name. Doc realignment filed on the Redesign board (Minor).

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

Kanban/History/BoardStoreHistory.swift

@@ -367,8 +367,10 @@ extension BoardStore {
     ///
     /// `.remove` is spelled as `nil`, which is the after-value the None well leaves: the key is gone,
     /// and the item renders the level's default (03-board-ui.md § Styling ▸ Controls).
-    static func styledFields(background: StyleChange, icon: StyleChange) -> [ExpectedField] {
-        field(background, as: ExpectedField.background) + field(icon, as: ExpectedField.icon)
+    static func styledFields(background: StyleChange, icon: StyleChange, iconColor: StyleChange) -> [ExpectedField] {
+        field(background, as: ExpectedField.background)
+            + field(icon, as: ExpectedField.icon)
+            + field(iconColor, as: ExpectedField.iconColor)
     }
 
     /// The same dimensions, holding the values the *inverse* restores — what the redo half validates
@@ -381,7 +383,9 @@ extension BoardStore {
         background: StyleChange,
         priorBackground: FieldValue<String>,
         icon: StyleChange,
-        priorIcon: FieldValue<String>
+        priorIcon: FieldValue<String>,
+        iconColor: StyleChange,
+        priorIconColor: FieldValue<String>
     ) -> [ExpectedField] {
         var fields: [ExpectedField] = []
         if background != .keep {
@@ -390,6 +394,9 @@ extension BoardStore {
         if icon != .keep {
             fields.append(.icon(priorIcon.value))
         }
+        if iconColor != .keep {
+            fields.append(.iconColor(priorIconColor.value))
+        }
         return fields
     }
 

Kanban/History/CardWindowUndo.swift

@@ -272,7 +272,7 @@ public final class CardWindowUndo {
         }
 
         private static let fieldOrder: [ExpectedField.Kind] = [
-            .title, .order, .width, .background, .backgroundImage, .icon, .body,
+            .title, .order, .width, .background, .backgroundImage, .icon, .iconColor, .body,
         ]
     }
 }

Kanban/History/HistoryStaleness.swift

@@ -42,6 +42,11 @@ public enum ExpectedField: Sendable, Equatable {
     /// `icon` — the styling gesture's symbol dimension.
     case icon(String?)
 
+    /// `iconColor` — the symbol's tint, the styling gesture's third dimension since the board
+    /// popover's symbol picker grew its colour row (2026-08-07; previously "schema yes, control
+    /// no"). `nil` is the removed key — the None well — exactly as everywhere else here.
+    case iconColor(String?)
+
     /// The body span, **byte for byte** — the Edit session's step, and the one inverse in the app
     /// whose fidelity is not field-level (13: "body steps compare bytes").
     case body(String)
@@ -57,6 +62,7 @@ public enum ExpectedField: Sendable, Equatable {
         case .background: .background
         case .backgroundImage: .backgroundImage
         case .icon: .icon
+        case .iconColor: .iconColor
         case .body: .body
         }
     }
@@ -70,6 +76,7 @@ public enum ExpectedField: Sendable, Equatable {
         case background
         case backgroundImage
         case icon
+        case iconColor
         case body
     }
 }
@@ -332,6 +339,7 @@ public enum HistoryStaleness {
         case let .background(expected): equal(document.background, expected)
         case let .backgroundImage(expected): equal(document.backgroundImage, expected)
         case let .icon(expected): equal(document.icon, expected)
+        case let .iconColor(expected): equal(document.iconColor, expected)
         case let .body(expected): document.body == expected
         }
     }