diff --git a/assets/themes/ayu/ayu.json b/assets/themes/ayu/ayu.json
index 3450e35bf6..c62f9eb112 100644
--- a/assets/themes/ayu/ayu.json
+++ b/assets/themes/ayu/ayu.json
@@ -391,6 +391,16 @@
             "color": "#5ac1feff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#aad94cff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#f07178ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -783,6 +793,16 @@
             "color": "#3b9ee5ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#6cbf43ff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#ff6666ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -1175,6 +1195,16 @@
             "color": "#72cffeff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#aad94cff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#f07178ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
diff --git a/assets/themes/gruvbox/gruvbox.json b/assets/themes/gruvbox/gruvbox.json
index 16ae188712..a4fc1b561b 100644
--- a/assets/themes/gruvbox/gruvbox.json
+++ b/assets/themes/gruvbox/gruvbox.json
@@ -406,6 +406,16 @@
             "color": "#83a598ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#b8bb26ff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#fb4934ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -813,6 +823,16 @@
             "color": "#83a598ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#b8bb26ff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#fb4934ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -1220,6 +1240,16 @@
             "color": "#83a598ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#b8bb26ff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#fb4934ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -1627,6 +1657,16 @@
             "color": "#0b6678ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#79740eff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#9d0006ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -2034,6 +2074,16 @@
             "color": "#0b6678ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#79740eff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#9d0006ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -2441,6 +2491,16 @@
             "color": "#0b6678ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#79740eff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#9d0006ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
diff --git a/assets/themes/one/one.json b/assets/themes/one/one.json
index 05af3f5cfe..409a5c705c 100644
--- a/assets/themes/one/one.json
+++ b/assets/themes/one/one.json
@@ -403,6 +403,16 @@
             "color": "#73ade9ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#98c379ff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#e06c75ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
@@ -805,6 +815,16 @@
             "color": "#5b79e3ff",
             "font_style": null,
             "font_weight": null
+          },
+          "diff.plus": {
+            "color": "#50a14fff",
+            "font_style": null,
+            "font_weight": null
+          },
+          "diff.minus": {
+            "color": "#e45649ff",
+            "font_style": null,
+            "font_weight": null
           }
         }
       }
diff --git a/crates/grammars/src/diff/highlights.scm b/crates/grammars/src/diff/highlights.scm
index a2e33190f1..3c9abbe147 100644
--- a/crates/grammars/src/diff/highlights.scm
+++ b/crates/grammars/src/diff/highlights.scm
@@ -3,15 +3,13 @@
 [
   (addition)
   (new_file)
-] @string
+] @string @diff.plus
 
-; TODO: This should eventually be `@diff.plus` with a fallback of `@string`
 [
   (deletion)
   (old_file)
-] @keyword
+] @keyword @diff.minus
 
-; TODO: This should eventually be `@diff.minus` with a fallback of `@keyword`
 (commit) @constant
 
 (location) @attribute
diff --git a/crates/theme/src/fallback_themes.rs b/crates/theme/src/fallback_themes.rs
index ba7f600fb0..a3831cafff 100644
--- a/crates/theme/src/fallback_themes.rs
+++ b/crates/theme/src/fallback_themes.rs
@@ -377,6 +377,8 @@ pub(crate) fn zed_default_dark() -> Theme {
                 ("variable".into(), HighlightStyle::default()),
                 ("variable.special".into(), red.into()),
                 ("variant".into(), HighlightStyle::default()),
+                ("diff.plus".into(), green.into()),
+                ("diff.minus".into(), red.into()),
             ])),
         },
     }