Mirrors the web frontend's design-system foundation pass (shipped on web
2026-04-27 in 7a9a8b7) for the Flutter app. Single-file change to
lib/core/theme.dart — most widgets read colorScheme.primary so the
palette flip alone covers a large surface.
Palette swap
- dark: cool grey #0F0F14 / #16161F → Obsidian #14171A / Iron #1E2228
with Slate #2C313A and Pewter #3F4651 borders; Parchment #E8E4D8
primary text, Vellum #C2BFB4 secondary
- light: white-and-cool-blue → warm parchment #F5F1E8 page / #FBF8F0
cards / #EFEAE0 inset; deep ink #14171A text; warm pewter #D9D6CE
borders
- primary (both modes): indigo #7C3AED → dusty violet #5B4A8A
- error: indigo-red pair → terracotta #C04A1F (semantic Error per the
doc; distinct from destructive Oxblood used for delete buttons)
Action token ThemeExtension
- New ActionColors extension exposes Moss / Bronze / Oxblood / Pewter
outside the ColorScheme so widgets can read them via
Theme.of(context).extension<ActionColors>()!.primary etc.
- Hybrid rule: ColorScheme.primary stays the dusty-violet brand accent
(Send buttons, empty-state CTAs); action buttons (Save / Cancel /
Delete / ghost) use the ActionColors palette. No widget refactors in
this commit — extension is defined for surface-phase work to consume.
Typography
- Inter loaded for body / labels / titleMedium-and-below (was system
default)
- Fraunces still loaded for display / headline / titleLarge — only at
≥18px per the doc rule
- JetBrains Mono available for code at call sites via
GoogleFonts.jetBrainsMono() (Flutter has no mono TextTheme slot)
GradientButton
- Brand-moment CTA equivalent of the web's --gradient-cta. Colors
swapped from indigo gradient to dusty-violet (#5B4A8A → #3F3560);
glow shadow rgba updated to match.
Out of scope (deferred to later surface-phase work)
- Per-screen button reclassification (Save → Moss FilledButton, Delete
→ Oxblood, etc.) — the ActionColors extension exists, no widgets
reach for it yet
- Lucide icon migration — separate task, requires picking a
flutter_lucide / lucide_icons package
- Input border radius (currently 24 / pill, doc says 8) — leave for
surface phase
- Voice/tone copy touchups
- Chat bubble Illuminated Transcript pattern (assistant left-edge
accent + glow) — not yet ported to ChatMessageBubble
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
bvandeusen