From 98b73009cc92575f7b361057265b0443e4234022 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Thu, 16 Nov 2023 23:01:26 +1100
Subject: [PATCH] Correct PDF palette size when saving

---
 src/PIL/PdfImagePlugin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/PIL/PdfImagePlugin.py b/src/PIL/PdfImagePlugin.py
index 09fc0c7e6ce..b6bb60911aa 100644
--- a/src/PIL/PdfImagePlugin.py
+++ b/src/PIL/PdfImagePlugin.py
@@ -96,7 +96,7 @@ def _write_image(im, filename, existing_pdf, image_refs):
         dict_obj["ColorSpace"] = [
             PdfParser.PdfName("Indexed"),
             PdfParser.PdfName("DeviceRGB"),
-            255,
+            len(palette) // 3 - 1,
             PdfParser.PdfBinary(palette),
         ]
         procset = "ImageI"  # indexed color