Hearts pink (`#fb9fb1`), Diamonds gold (`#ddb26f`), Clubs lime
(`#acc267`), Spades gray (`#d0d0d0`) — each suit picks up its
own base16-eighties accent so a player scanning the table can
distinguish the suit by hue alone (faster recognition than the
2-colour traditional red/black scheme; common in poker decks).
All four colours already exist in the palette as semantic
state-token accents, so this is a pure remapping at the suit-
glyph site, not a palette extension.
The outlined-glyph differentiation (♦ ♣ outlined, ♥ ♠ filled)
is preserved on top of the colour split — it stays the always-
on colour-blind fallback per `design-system.md` §Accessibility,
and matters more than ever now that CBM hearts (lime) and
default clubs (lime) share a hue.
### Changes
- `card_face_svg.rs`: split `SUIT_RED` / `SUIT_DARK` into four
per-suit constants (`SUIT_HEART` / `SUIT_DIAMOND` / `SUIT_CLUB`
/ `SUIT_SPADE`). `suit_paint()` returns each suit's own
colour. Card border picks up the suit colour automatically
via the existing `(colour, paint)` destructure.
- `card_plugin.rs`: new `DIAMOND_SUIT_COLOUR` + `CLUB_SUIT_COLOUR`
constants; `text_colour()` rewritten as a per-suit match (was
red/black bifurcation). Both rendering paths (PNG production +
constant fallback under MinimalPlugins) stay in lockstep.
- CBM behaviour clarified: only hearts swap to lime now;
diamonds + clubs + spades are already hue-distinct from
the heart pink and stay unchanged. Under CBM the heart
(lime) and club (lime) share a hue but stay distinguishable
via the always-on filled-vs-outlined glyph differentiation.
- HC behaviour: only hearts (→ HC red) and spades (→ HC white)
have defined boosts. Diamonds (gold) and clubs (lime) are
already mid-luminance accents and stay at their default.
New test `text_colour_diamonds_and_clubs_are_immune_to_accessibility_flags`
pins all four flag combinations as no-ops for the gold +
lime suits.
- `design-system.md` §Suit Colors retitled "Four-color deck"
with the 4-colour table; CBM section text updated to
describe the hearts-only swap and the hearts/clubs hue
collision under CBM.
- `card_face_svg_pin.rs` rebaselined: 26 hashes drift
(13 clubs + 13 diamonds — the two suits whose colours
changed). Hearts, spades, and the 5 backs all keep their
prior hashes. Surgical scope, exactly what the pin test
was designed to surface.
### Tests
1191 passing / 0 failing — net 0 from the prior baseline:
two old 2-colour tests removed
(`text_colour_is_red_for_hearts_and_diamonds`,
`text_colour_is_black_for_clubs_and_spades`), one consolidated
4-colour test added
(`text_colour_4_colour_deck_assigns_each_suit_its_own_hue`)
plus a pairwise-distinct invariant guard, and one new test
covering the gold/lime suits' immunity to CBM/HC flags. Six
existing CBM/HC tests rewritten to use only the suits each flag
actually affects under the new scheme (hearts for CBM, hearts +
spades for HC).
Workspace clippy clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
funman300
62b61cc786