Replica: swap G/B HUB75 pins for panels with green/blue LEDs exchanged

Manufacturer confirmed these matrices have the green and blue LEDs
swapped; orange (255,96,0) rendered purple. Exchange the G and B pin
assignments so every color is corrected at the wire level and the
firmware's color values stay identical to vPLASMA's.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

PlasmaNew/replica/MatrixPortalPlasma/MatrixPortalPlasma.ino

@@ -19,9 +19,10 @@
 #include "demo_screens.h"
 
 // ---- HUB75 pins for the Adafruit Matrix Portal S3 ------------------------
-// These are Adafruit's published Matrix Portal S3 pins (Protomatter examples).
-// Verify against your installed library version if the panel misbehaves.
-static uint8_t rgbPins[]  = {42, 41, 40, 38, 39, 37};
+// Adafruit's published Matrix Portal S3 pins (Protomatter examples), except:
+// these panels have the green and blue LEDs swapped (manufacturer-confirmed),
+// so the G and B pins are exchanged here. Order is R1,G1,B1,R2,G2,B2.
+static uint8_t rgbPins[]  = {42, 40, 41, 38, 37, 39};
 static uint8_t addrPins[] = {45, 36, 48, 35};  // A,B,C,D — 4 lines for 32-high (1/16 scan)
 static uint8_t clockPin   = 2;
 static uint8_t latchPin   = 47;

PlasmaNew/replica/README.md

@@ -45,8 +45,10 @@ Arduino IDE (or `arduino-cli`):
    `plasma_fonts.h`, `demo_screens.h` beside it) and Upload.
 
 The HUB75 pin arrays at the top of the `.ino` are Adafruit's published Matrix
-Portal S3 values; if the panel garbles, verify them against your installed
-Protomatter version.
+Portal S3 values — except the G and B pins, which are exchanged because these
+panels have the green and blue LEDs swapped (manufacturer-confirmed; symptom
+was orange rendering as purple). If a different panel garbles, verify the
+arrays against your installed Protomatter version.
 
 ## Using it with the game