diff --git a/release/datafiles/userdef/userdef_default_theme.c b/release/datafiles/userdef/userdef_default_theme.c
index 85532d01d5c..05c5a625215 100644
--- a/release/datafiles/userdef/userdef_default_theme.c
+++ b/release/datafiles/userdef/userdef_default_theme.c
@@ -817,7 +817,7 @@ const bTheme U_theme_default = {
     },
     .shade2 = RGBA(0x7f707064),
     .grid = RGBA(0x23232300),
-    .wire = RGBA(0x808080ff),
+    .wire = RGBA(0x232323ff),
     .select = RGBA(0xed5700ff),
     .active = RGBA(0xffffffff),
     .edge_select = RGBA(0xffffffff),
diff --git a/source/blender/blenkernel/BKE_blender_version.h b/source/blender/blenkernel/BKE_blender_version.h
index 6f7e6363a37..b973d8b9a18 100644
--- a/source/blender/blenkernel/BKE_blender_version.h
+++ b/source/blender/blenkernel/BKE_blender_version.h
@@ -39,7 +39,7 @@ extern "C" {
 
 /* Blender file format version. */
 #define BLENDER_FILE_VERSION BLENDER_VERSION
-#define BLENDER_FILE_SUBVERSION 26
+#define BLENDER_FILE_SUBVERSION 27
 
 /* Minimum Blender version that supports reading file written with the current
  * version. Older Blender versions will test this and show a warning if the file
diff --git a/source/blender/blenloader/intern/versioning_userdef.c b/source/blender/blenloader/intern/versioning_userdef.c
index a0f35d32a7c..64ecfbe78de 100644
--- a/source/blender/blenloader/intern/versioning_userdef.c
+++ b/source/blender/blenloader/intern/versioning_userdef.c
@@ -291,6 +291,16 @@ static void do_versions_theme(const UserDef *userdef, bTheme *btheme)
     btheme->space_sequencer.grid[3] = 255;
   }
 
+  if (!USER_VERSION_ATLEAST(300, 27)) {
+    /* If users have not changed the color of the wires inner color or main color,
+     * set it to the new default. */
+    if ((btheme->space_node.wire[0] == 35) && (btheme->space_node.wire[1] == 35) &&
+        (btheme->space_node.wire[2] == 35) && (btheme->space_node.syntaxr[0] == 128) &&
+        (btheme->space_node.syntaxr[1] == 128) && (btheme->space_node.syntaxr[2] == 128)) {
+      FROM_DEFAULT_V4_UCHAR(space_node.wire);
+    }
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *