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/UI/StyleEditor.swift

@@ -36,12 +36,13 @@ enum StyleCommand {
     static func apply(
         background: StyleChange = .keep,
         icon: StyleChange = .keep,
+        iconColor: StyleChange = .keep,
         to target: StyleTarget,
         in store: BoardStore,
         recents: StyleRecents,
         on undo: CardWindowUndo? = nil
     ) {
-        store.applyStyle(to: target, background: background, icon: icon, on: undo)
+        store.applyStyle(to: target, background: background, icon: icon, iconColor: iconColor, on: undo)
         if case let .set(value) = background {
             recents.record(value)
         }