diff --git a/gfx/wr/wrench/src/wrench.rs b/gfx/wr/wrench/src/wrench.rs
index 4116ff1726fc..e3cbcbafa5f3 100644
--- a/gfx/wr/wrench/src/wrench.rs
+++ b/gfx/wr/wrench/src/wrench.rs
@@ -511,7 +511,6 @@ impl Wrench {
         size: f32,
         flags: FontInstanceFlags,
         render_mode: Option<FontRenderMode>,
-        bg_color: Option<ColorU>,
         synthetic_italics: SyntheticItalics,
     ) -> FontInstanceKey {
         let key = self.api.generate_font_instance_key();
@@ -521,9 +520,6 @@ impl Wrench {
         if let Some(render_mode) = render_mode {
             options.render_mode = render_mode;
         }
-        if let Some(bg_color) = bg_color {
-            options.bg_color = bg_color;
-        }
         options.synthetic_italics = synthetic_italics;
         txn.add_font_instance(key, font_key, size, Some(options), None, Vec::new());
         self.api.send_transaction(self.document_id, txn);
diff --git a/gfx/wr/wrench/src/yaml_frame_reader.rs b/gfx/wr/wrench/src/yaml_frame_reader.rs
index 2cbe30a51c7a..e67e749d56a9 100644
--- a/gfx/wr/wrench/src/yaml_frame_reader.rs
+++ b/gfx/wr/wrench/src/yaml_frame_reader.rs
@@ -329,7 +329,7 @@ pub struct YamlFrameReader {
     image_map: HashMap<(PathBuf, Option<i64>), (ImageKey, LayoutSize)>,
 
     fonts: HashMap<FontDescriptor, FontKey>,
-    font_instances: HashMap<(FontKey, FontSize, FontInstanceFlags, Option<ColorU>, SyntheticItalics), FontInstanceKey>,
+    font_instances: HashMap<(FontKey, FontSize, FontInstanceFlags, SyntheticItalics), FontInstanceKey>,
     font_render_mode: Option<FontRenderMode>,
     allow_mipmaps: bool,