From 8358b4ac8d6161074848c0ac36287c742339c77a Mon Sep 17 00:00:00 2001
From: edo999 <edo999@gmail.com>
Date: Sun, 19 May 2024 09:47:34 +0100
Subject: [PATCH] =?UTF-8?q?Keep=20the=20palettes=20first=20colours=20in=20?=
 =?UTF-8?q?sync=20=E2=8F=B1=EF=B8=8F.?=
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---
 src/containers/RoomsContainer.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/containers/RoomsContainer.js b/src/containers/RoomsContainer.js
index 242e145..4cd63f9 100644
--- a/src/containers/RoomsContainer.js
+++ b/src/containers/RoomsContainer.js
@@ -56,7 +56,14 @@ const RoomsContainer = ({ rooms, roomgfx, globdata }) => {
 
   const updatePalette = (i, colourId) => {
     const newRoom = structuredClone(room);
-    newRoom.nametable.palette[i] = colourId;
+    if (i % 4 === 0) {
+      // Keep the first colours in sync.
+      for (let i = 0; i < 16; i += 4) {
+        newRoom.nametable.palette[i] = colourId;
+      }
+    } else {
+      newRoom.nametable.palette[i] = colourId;
+    }
     setRoom(newRoom);
   };