diff --git a/PlasmaNew/replica/MatrixPortalPlasma/MatrixPortalPlasma.ino b/PlasmaNew/replica/MatrixPortalPlasma/MatrixPortalPlasma.ino
index 9d4b718..cf7de66 100644
--- a/PlasmaNew/replica/MatrixPortalPlasma/MatrixPortalPlasma.ino
+++ b/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;
diff --git a/PlasmaNew/replica/README.md b/PlasmaNew/replica/README.md
index 928c317..432fc66 100644
--- a/PlasmaNew/replica/README.md
+++ b/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