diff --git a/scripts/verify-generated-theme.ts b/scripts/verify-generated-theme.ts
index 1a7e8f6..feed6f4 100644
--- a/scripts/verify-generated-theme.ts
+++ b/scripts/verify-generated-theme.ts
@@ -30,6 +30,8 @@ const requiredDarkSnippets = [
   "--is-dark-theme: true",
   "--color-body: #0d1117",
   "--color-text: #e6edf3",
+  "--color-diff-added-row-bg: #033a16",
+  "--color-diff-removed-row-bg: #490202",
   "--github-bgColor-accent-emphasis: #1f6feb",
   "--color-syntax-keyword: #ff7b72",
   "--color-syntax-string: #a5d6ff",
@@ -74,7 +76,15 @@ for (const file of [
   }
 }
 
-for (const file of ["theme-meta.ts", "core.ts", "github-colors.ts", "syntax-colors.ts", "target-colors.ts", "index.ts"]) {
+for (const file of [
+  "theme-meta.ts",
+  "core.ts",
+  "diff-colors.ts",
+  "github-colors.ts",
+  "syntax-colors.ts",
+  "target-colors.ts",
+  "index.ts",
+]) {
   if (!darkThemeFiles.includes(file)) {
     throw new Error(`themes/github-dark is missing theme source file: ${file}`);
   }
diff --git a/themes/github-dark/diff-colors.ts b/themes/github-dark/diff-colors.ts
new file mode 100644
index 0000000..8fbe945
--- /dev/null
+++ b/themes/github-dark/diff-colors.ts
@@ -0,0 +1,15 @@
+export const diffColorTokens = `
+--color-diff-added-fg: #3fb950;
+  --color-diff-added-linenum-bg: #0e4429;
+  --color-diff-added-row-bg: #033a16;
+  --color-diff-added-row-border: #196c2e;
+  --color-diff-added-word-bg: #196c2e;
+  --color-diff-removed-fg: #ff7b72;
+  --color-diff-removed-linenum-bg: #67060c;
+  --color-diff-removed-row-bg: #490202;
+  --color-diff-removed-row-border: #7d121c;
+  --color-diff-removed-word-bg: #7d121c;
+  --color-diff-moved-row-bg: #3d2f00;
+  --color-diff-moved-row-border: #9e6a03;
+  --color-diff-inactive: #161b22;
+`.trim();
diff --git a/themes/github-dark/index.ts b/themes/github-dark/index.ts
index a58e5f0..6552dff 100644
--- a/themes/github-dark/index.ts
+++ b/themes/github-dark/index.ts
@@ -1,9 +1,9 @@
 import { ansiColorTokens } from "../github-light/ansi-colors";
-import { diffColorTokens } from "../github-light/diff-colors";
 import { namedColorTokens } from "../github-light/named-colors";
 import { semanticColorTokens } from "../github-light/semantic-colors";
 import { consoleTokens } from "./console";
 import { coreTokens } from "./core";
+import { diffColorTokens } from "./diff-colors";
 import { githubColorTokens } from "./github-colors";
 import { syntaxColorTokens } from "./syntax-colors";
 import { targetColorTokens } from "./target-colors";
diff --git a/themes/github-dark/syntax-colors.ts b/themes/github-dark/syntax-colors.ts
index d2a936e..0efe268 100644
--- a/themes/github-dark/syntax-colors.ts
+++ b/themes/github-dark/syntax-colors.ts
@@ -29,8 +29,8 @@ export const syntaxColorTokens = `
   --color-syntax-punctuation: var(--color-text);
   --color-syntax-whitespace: #f85149;
   --color-syntax-diff-fg: var(--color-text);
-  --color-syntax-deleted-bg: #67060c;
-  --color-syntax-inserted-bg: #033a16;
+  --color-syntax-deleted-bg: var(--color-diff-removed-row-bg);
+  --color-syntax-inserted-bg: var(--color-diff-added-row-bg);
   --color-syntax-emph: var(--color-text);
   --color-syntax-strong: var(--color-text);
   --color-syntax-heading: #1f6feb;