feat(palette): add a translucent scrim role for fullscreen overlays

The power menu's ground was a hardcoded rgba(36, 39, 58, 0.88),
Macchiato's base, so every other scheme drew its overlay with a
Macchiato tint. Each roles file now defines scrim as its own
background at 88% alpha, udt-palette emits it into palette.rasi, and
powermenu.rasi uses @scrim.

scrim is the first translucent palette entry, so udt-accent's QML
palette no longer drops the alpha pair: an opaque colour still goes
out as #rrggbb, a translucent one as QML's #aarrggbb.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2 files changed, 7 insertions, 4 deletions

diff --git a/bin/udt-accent b/bin/udt-accent
index e366bb1..72d3a64 100755
--- a/bin/udt-accent
+++ b/bin/udt-accent
@@ -242,9 +242,9 @@ def write_hyprlock_border(name):
 def read_palette():
     """Parse palette.rasi into {name: "#rrggbb"}.
 
-    rofi writes colours as #rrggbbaa; QML wants #rrggbb, and every entry in
-    that file is fully opaque, so the alpha pair is dropped rather than
-    converted. Returns an empty dict if the file is missing, which leaves the
+    rofi writes colours as #rrggbbaa; QML wants #rrggbb, or #aarrggbb when
+    translucent. Only scrim is, so an opaque alpha pair is dropped and any
+    other is moved to the front. Returns an empty dict if the file is missing, which leaves the
     QML palette to fall back to its own defaults.
     """
     try:
@@ -254,7 +254,8 @@ def read_palette():
 
     found = {}
     for key, value in re.findall(r"(\w+):\s*#([0-9a-fA-F]{6,8})\s*;", text):
-        found[key] = "#" + value[:6]
+        alpha = value[6:].lower()
+        found[key] = "#" + (alpha if alpha not in ("", "ff") else "") + value[:6]
     return found
 
 
diff --git a/bin/udt-palette b/bin/udt-palette
index f603899..234d97a 100755
--- a/bin/udt-palette
+++ b/bin/udt-palette
@@ -151,6 +151,8 @@ ROFI_NAMES = [
     # the active border, which is magenta under candy-night; termblue is the
     # terminal's blue, a real blue in every scheme but Dracula, which has none.
     ("peach", "peach"), ("mauve", "highlight"), ("termblue", "blue"),
+    # The one translucent entry: the fullscreen overlays' ground.
+    ("scrim", "scrim"),
 ]