diff --git a/book/external/Sphinx-Named-Colors b/book/external/Sphinx-Named-Colors
index 9f11680..b15380a 160000
--- a/book/external/Sphinx-Named-Colors
+++ b/book/external/Sphinx-Named-Colors
@@ -1 +1 @@
-Subproject commit 9f116800cb90bde5cd45be9c66a47dfc60792eaa
+Subproject commit b15380a2f102ef48206ca919df2c650577d03705