chore(peggle): update peg color palette to match spritesheet

Update PEG_TINT and PEG_LIT color constants to match the dominant fills
of the peg frames in peggle-sprites.png, ensuring procedural bricks and
fallback pegs stay in scheme. Document that these constants should be
re-sampled if the spritesheet is repainted.

assets/gamedata/peggle/sprites.md

@@ -109,7 +109,10 @@ fever sweep.
 
 Bricks are **procedurally drawn** (not in the sprite sheet): color fill with a
 dark outer stroke and a light inner inset stroke, using the same palette as
-the pegs. The reserved sheet frames 9–15 could skin them later if wanted.
+the pegs. The palette (`PEG_TINT`/`PEG_LIT` in `src/games/peggle/PeggleGame.js`)
+is sampled from the dominant fill of each peg frame in `peggle-sprites.png` —
+**if you repaint the peg colors, re-sample those two constants** so bricks
+stay in scheme. The reserved sheet frames 9–15 could skin them later if wanted.
 
 ## Not covered by the sheet
 

src/games/peggle/PeggleGame.js

@@ -20,8 +20,11 @@ const BOARD_H = TUNING.BOARD_H;
 const SIM_STEP = 1 / 60;
 const FEVER_TIMESCALE = 0.3;
 
-const PEG_TINT = { blue: 0x4d8dee, orange: 0xff8a1e, green: 0x3ed164, purple: 0xc05df0 };
-const PEG_LIT = { blue: 0x9cc4ff, orange: 0xffc266, green: 0x8df2a8, purple: 0xe3a8ff };
+// Palette sampled from the dominant fill of each frame in
+// assets/images/peggle-sprites.png, so brick curves (and the procedural peg
+// fallback) match the painted pegs. Re-sample if the sheet is repainted.
+const PEG_TINT = { blue: 0x6050b0, orange: 0xb86030, green: 0x58c040, purple: 0xc850b8 };
+const PEG_LIT = { blue: 0x3000f8, orange: 0xe0a880, green: 0x50e020, purple: 0xf880f0 };
 
 // Optional drop-in spritesheet (see assets/gamedata/peggle/sprites.md). When
 // assets/images/peggle-sprites.png exists it replaces the procedural circles;